Answer:
A. By withholding information about Fortunato's condition.
Explanation:
In this example, the author creates surprise by withholding information about Fortunato's condition. We learn that Fortunato is beginning to wake up, which increases tension. However, the author does not actually state what is happening to Fortunato. He tells us that there is moaning cry, and then a long silence, but he does not tell us more. This is intended to increase suspense about Fortunato's condition.