The correct answer is B) This building has been painted by student volunteers.
The other options are in the active (A and C), or in the imperative (D).
Squealer reads to the animals fake figures to make them feel better about their work and to confuse them from understanding why the crops are disappearing. He does this to hide the fact that the pigs are eating a majority of the food.
To answer this you just have to give your opinion on the question.
Answer: c, one is slightly less traveled