Which sentence has correct pronoun and antecedent agreement?

-Because the brothers were tied, he forgot to shut the gate and the dog ran out
-While the neighbors were walking to the store, they dropped their money and the wind blew it away
-When the teachers arrived at school, she saw the students writing with chalk.
-Carol wanted to go outside, but it was raining and she could not find our rain jacket.

Carol wanted to go outside, but it was raining and she could not find her rain jacket.