Answer: Option (c) is correct.
Step-by-step explanation:
Given that,
Price elasticity of demand = 0.5
Percentage increase in price = 8%
Price elasticity of demand =

0.5 =

Percentage change in quantity demanded = 0.5 × 8
= 4%
Therefore, if the price rises by 8% then as a result quantity demanded decreases by 4%.