Question

fill in the blank to complete the statement with the word or words most appropriate for academic writing.
starting in 1964, some american demonstrators burned draft cards, which designated them as eligible for compulsory military service. the demonstrators were protesting against both the vietnam war and the process of drafting young men into the armed forces.
their his or her

Explanation:

In academic writing, when referring to a plural antecedent (here, "some American demonstrators"), the possessive pronoun "their" is appropriate. "His or her" is used for a singular antecedent. Since "demonstrators" is plural, "their" is the correct choice.

Answer:

their