Allie opened the door to the backyard to let her dog Rex in. Rex had been out all day. Allie looked around the whole yard, but she didn't see him.

She listened for the jingle that Rex's collar made when he moved. But the yard was still.
Allie stepped outside and closed the door behind her. "Rex!" she called.
Allie noticed that the gate was open. "Uh-oh," she thought.
Based on the passage, which is more likely to happen next?
a: Allie finds Rex in the house
b: Allie looks for Rex outside the gate

b: Allie looks for Rex outside the gate