The adverb clause until her feet ached modifies

a) the verb, danced.
b) the pronoun, her.
c) the noun, ballerina.
d) the adjective, young.

A) the verb, danced.

Explanation: I Took The Test On USA Test Prep.

the autor of the text is bringing the point that one achievment of the president john f. kennedy was a success and this caused the next president to use a similar idea. the purposefor the use of the quotation in the text is to support the idea that peace corps was a result of the president's call. in this case, the quotation is presented as part of the writing and does not stand on its own.

answer a.

the krebs cycle and electron transport occur in the mitochondria, though other than that i would need to know more information.