Which of the following verbs most likely indicates passive voice?

will have been standing

was found

became

rode

To be

Explanation:

Because it's the only one that includes "to be" in it ...

To identify passive voice, look at what happened and look at who was responsible for doing it. If the person or thing responsible for doing the actions is either omitted or occurs in the sentence AFTER the thing that happened, AND if you see a past participle straight after the form of "to be," it's passive voice.

Meg was found to be the better behaved of the four. Because it's the only one that includes "to be" in it ...