The Bills Collection Frequency

Based on the information provided, the correct answer is option 'D' - the bills were collected at the end of the month. Let's explore this answer in detail.

Explanation:
Collecting bills is a common practice in various industries and sectors. It involves the collection of payments for goods or services provided by a company or organization. The frequency at which bills are collected depends on the specific policies and practices followed by the company.

Options:
Let's examine each option provided to understand why option 'D' is the correct answer.

a) Daily: If bills were collected daily, it would mean that payments were collected every day. However, this option is not the correct answer because it contradicts the given information that bills were collected at the end of the month.

b) Weekly: If bills were collected weekly, it would mean that payments were collected every week. However, this option is also not the correct answer because it contradicts the given information that bills were collected at the end of the month.

c) Fortnightly: If bills were collected fortnightly, it would mean that payments were collected every two weeks. However, this option is not the correct answer because it contradicts the given information that bills were collected at the end of the month.

d) At the end of the month: This option aligns with the given information and is the correct answer. It means that bills were collected once a month, specifically at the end of the month. This could be a common practice for companies or organizations to consolidate their billing and collect payments from their customers at the end of each month.

Conclusion:
Based on the information provided, the bills were collected at the end of the month. This implies that payments were collected once a month, aligning with the chosen option 'D' as the correct answer.