Respuesta :
Option a) Active voice, will be the correct option for the given sentence.
This active voice is a grammar term used to classify the sentences.
An Active Voice is used to describe the sentence where the subject performs the action. It can also be said that, active voice is when the subject performs a verb.
It is one of the two voices of verb, which is used in writing or delivering the speech.
It is so because, the sentence is describing that the subject performs an action. As "Martha" is the subject, whereas, she took the decision of returning to school will be the action which she will perform.
To learn more about active voice here
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