Question

the centerpiece of the work was dominated by images of native people being oppressed and including an eagle symbolizing the united states
included
includes
had included
no change

Explanation:

The original sentence has a verb tense consistency issue. The main verb "was dominated" is in the past tense. "Including" is a present - participle, which is not consistent. "Included" is the past - tense form and matches the tense of "was dominated" to make the sentence grammatically correct. "Includes" is present tense and "had included" is past perfect, both of which do not fit the context as well as "included".

Answer:

A. included