Which revision of this sentence uses a participial phrase?

The bathtub was slow to drain after the dog's bath.

The bathtub in my bathroom was slow to drain after the dog's bath.

The bathtub, its rim caked with dirt, was slow to drain after the dog's bath.

The bathtub was slow to drain because the dog sheds hair and dirt.

The bathtub, clogged with dirt and hair, was slow to drain after the dog's bath.