Question

complete the sentence with the correct plural.
white house
chief of staff
have traditionally served as presidential
assistants; in fact, president franklin d. roosevelt first named the position \assistant
to the president\ upon its creation in 1939.

Explanation:

The phrase "chief of staff" follows standard pluralization rules for compound nouns: the main noun ("chief") is made plural, while "staff" remains unchanged as it refers to a collective group in this context.

Answer:

chiefs of staff