Which character(s) in a story would most likely be used in a subplot?

Which of these authors wrote a story that revolved around a captains underwater adventures with his crew and a sub marine long before the submarine was actually invented

The room was gaudy with its leather couch and purple walls

Identify the statement that uses the verb mood in the interrogative. a. she could if you ask politely. b. could an angel break my heart? c. in the group, tiger could run the fastest. d. stop imagining about what he could do.