Which of the Following Statements Regarding Imports and Exports Is

Which of the following statements regarding imports and exports is true?

A) Both imports and exports vary directly with the level of domestic income.
B) Both imports and exports vary inversely with the level of domestic income.
C) Imports vary directly with the level of domestic income; exports are independent of the level of domestic income.
D) Exports vary directly with the level of domestic income; imports are independent of the level of domestic income.
E) Both imports and exports are independent of the level of domestic income.