All of the following will cause a shift in the demand curve for oranges except .

A. an increase in the price of apple juice.
B. more people start drinking orange juice for breakfast.
C. a decrease in the price of oranges.
D. a new study suggest that orange juice is good for healthy bones.
E. excessive rain in northern Florida might cause supply of oranges to decrease.

The correct answer is letter "D": a new study suggest that orange juice is good for healthy bones.

Explanation:

The demand curve represents the relationship between the price and the quantity demanded for a good or service. When the price rises, the quantity demanded falls and the demand curve shifts leftwards. If the price decreases, the quantity demanded increases and the demand curve shifts rightwards.

Thus, if a new study unveils the beneficial properties of oranges in keeping bones healthy, the reaction of consumers is uncertain. It is supposed to increase the demand for oranges but that does not necessarily need to happen.

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