It is D. Four off-duty stewards sat in the dining saloon and gossiped about passengers, a favorite pastime of off-duty stewards. A weak shudder interrupted their conversation and disturbed the silverware on the table. Steward James Johnson thought that the shudder was a dropped propeller blade. He knew that they would return to the Harland & Wolff Shipyard in Belfast and have time to enjoy themselves. This made one of the stewards happy, and he shouted, “Another Belfast trip!”
Adverbs often act like adjectives and they often come before a verb, so for example, this sentence: She <u>beautifully</u> walked down the aisle. Beautifully is the adverb.