Which sentences from Ellery Queen’s “Object Lesson” create suspense? Check all that apply.

A bell began clanging in the corridor. First period over. 9:35.
Louise Carpenter was gripping a desk, her knuckles white.
The next few minutes were noisy.
“I found two boys with bills — in each case a single, too.”
Six minutes left in which not only to find the money but identify the thief!