In which sentence does the underlined objective complement function as a noun? the band director thought jake wise for practicing and taking lessons before his audition. mr. orland considered grace's tuba-playing skills stellar. the director appointed cameron leader of his section?

Assuming the underlined words are wise, stellar, and leader, the correct answer is the final option - The director appointed Cameron leader of his section.
Objective complement is a word, phrase, or clause which completes the object within a sentence. In the last option, the object of the sentence is Cameron, and the phrase that completes it/describes it more is 'leader of his section.'

The answer should be d.