Which revision of these two sentences best shows that the cat walking into the barn happened first?

The cat walked into the barn. The mouse hid in the straw.


The cat walked into the barn while the mouse hid in the straw.

The cat walked into the barn, and then the mouse hid in the straw.

The cat walked into the barn, or the mouse hid in the straw.

The cat walked into the barn, but the mouse hid in the straw.