**Answer:**

The correct answer is option 'A', Alauddin Khilji, who was a ruler of the Delhi Sultanate in the 14th century, enforced a price control system.

**Alauddin Khilji:**

Alauddin Khilji, who ruled from 1296 to 1316 AD, was known for his administrative reforms and military conquests. One of his significant reforms was the enforcement of a price control system, known as the "Market Control" or "Market Regulations" policy. This policy aimed to regulate and control the prices of essential commodities and other goods in the market to ensure their availability at reasonable rates.

**Reasons for Enforcement:**

Alauddin Khilji implemented the price control system due to several reasons:

1. **Economic Stability:** Alauddin Khilji wanted to ensure economic stability in his kingdom. By controlling prices, he aimed to prevent inflation, hoarding, and black marketing, which were prevalent during that time.

2. **Welfare of the People:** The price control system was implemented to protect the common people from exploitation by unscrupulous traders and merchants who manipulated prices to their advantage.

3. **Military Provisions:** Alauddin Khilji also wanted to ensure a constant supply of essential commodities and provisions for his large army. By regulating prices, he aimed to secure a steady supply of food, clothing, and other necessities for his soldiers.

**Implementation of Price Control:**

To enforce the price control system, Alauddin Khilji took several steps:

1. **Market Monitoring:** The government appointed officers known as "Shahna" to monitor the markets and enforce the price regulations. These officers would inspect and ensure that prices were not being artificially inflated by traders.

2. **Price Caps:** Alauddin Khilji set price caps on various essential commodities, such as grains, sugar, salt, oil, and cloth. These caps determined the maximum price at which these commodities could be sold.

3. **Strict Punishments:** Stringent punishments were imposed on those found violating the price control regulations. Traders who charged higher prices or hoarded goods were severely punished, including confiscation of their property.

**Effects and Outcomes:**

The price control system implemented by Alauddin Khilji had both positive and negative effects:

1. **Positive Effects:** The system ensured the availability of essential commodities at reasonable prices, benefiting the common people. It also helped in stabilizing the economy and curbing inflation.

2. **Negative Effects:** The price control system led to a decline in trade and commerce as traders were discouraged by the strict regulations. It also resulted in a shortage of goods due to hoarding and black market activities.

Overall, Alauddin Khilji's enforcement of the price control system was a significant administrative reform aimed at protecting the welfare of the people and maintaining economic stability in his kingdom.