The answer to your question is A) Therefore.
Answer:
Nineteen Eighty-four, also published as 1984, novel by English author George Orwell published in 1949 as a warning against totalitarianism. The chilling dystopia made a deep impression on readers, and his ideas entered mainstream culture in a way achieved by very few books.
Explanation:
A. You cannot have ice cream until you clean your room
The active voice is when the subject performs the action of a verb, for example:
My father <u>works</u> in a Bank.
my father is the subject and does what the verb tells, <u>works</u>
The sentence that displays an active voice structure is:
George Washington Carver <u>painted</u> pictures while at Simpson College.
Subject + <u>verb</u>