Intersecting Demand Curves: If any two straight line demand curves intersect each other, then, at any particular price of the good concerned, the steeper line would have a lower e and the flatter line would have a higher e.

Negatively sloped demand curves indicate an inverse relationship between price and quantity demanded. When two negatively sloped demand curves intersect, it means that at a certain price, the quantity demanded is the same for both curves. In this scenario, the correct answer is option 'D' - the flatter demand curve will have higher elasticity.

Explanation:

1. Understanding Elasticity:
Elasticity measures the responsiveness of quantity demanded to changes in price. It indicates the percentage change in quantity demanded for a given percentage change in price. Elasticity can be classified into three categories:
- Elastic demand: Quantity demanded is highly responsive to price changes (Elasticity > 1).
- Inelastic demand: Quantity demanded is not very responsive to price changes (Elasticity < />
- Unitary elastic demand: Quantity demanded changes proportionally to price changes (Elasticity = 1).

2. Intersecting Demand Curves:
When two negatively sloped demand curves intersect, it means that there is a common price at which the quantity demanded is the same for both curves. At this price, both demand curves have the same quantity demanded.

3. Determining Elasticity:
To determine the elasticity, we need to consider the slope (steepness) of the demand curves. The steeper the demand curve, the less responsive quantity demanded is to price changes, indicating a lower elasticity. On the other hand, the flatter the demand curve, the more responsive quantity demanded is to price changes, indicating a higher elasticity.

4. Applying the Concept:
In the given scenario, when two negatively sloped demand curves intersect, their slopes will differ. The steeper demand curve will have a lower elasticity because it is less responsive to price changes. Conversely, the flatter demand curve will have a higher elasticity because it is more responsive to price changes.

Therefore, option 'D' is correct - the flatter demand curve will have higher elasticity.

To summarize, when two negatively sloped demand curves intersect, the flatter demand curve will have a higher elasticity because it is more responsive to price changes, while the steeper demand curve will have a lower elasticity as it is less responsive to price changes.

A