Answer:
B). The income effect of a price reduction may be negative for some price changes
Step-by-step explanation:
Engle curve is demonstrated as the graphic concept in microeconomics that intends to show the impact of variation in household income on the household expenditure incurred on a specific good or service.
As per the given situation that 'if the Engle curve for the consumption of a specific good called good x is decreasing at some specific income level', then, 'the income effect of a price reduction may be negative for some price changes' as if there is a rise in income the consumption of good x(if it's inferior) may decrease even if the price of the product reduces because the consumer would switch to normal goods. Therefore, in such a case, the income effect could be negative in some cases. Thus, option B is the correct answer.