Question

in a passive voice sentence, what word might precede the object? is be must by

Explanation:

In passive voice, the structure often involves the agent (the doer of the action) being introduced by "by" after the object (or the main verb phrase). For example, "The book was read by me." Here, "by" precedes the agent (which can be considered related to the object - related structure in passive voice). "Is" and "Be" are part of the verb phrase (auxiliary verbs) and don't precede the object in the relevant way, and "Must" is a modal verb also not used to introduce the agent/object - related part in passive voice.

Answer:

D. By