"Maya glanced at the old, dusty clock on the wall. The ticking sound was louder than usual, almost as if the clock was mocking her. She sighed and returned to her book, but her eyes kept drifting to the window, where the rain pelted against the glass. Her mind raced with thoughts of the upcoming test. She had studied, but the doubt was creeping in, wrapping around her like a thick fog."

Which of the following inferences is best supported by the details in the excerpt?