The sentence that uses a verb that agrees with its compound subject is option C. She and her committee appreciate the donations they received. The compound subject in this sentence is, "she and her committee". This compound subject joined by the word "and" is treated as a plural subject; therefore, the verb should also be plural.
In the sentence, "the ankle and foot sustained 40 percent of the injuries, especially ligament strains" Sustained is the main verb.
