Read the sentence.
Swimming through the ocean, the fin of the whale slapped against the water.
Which option best revises the sentence to correct the dangling modifier?
Through the ocean and slapping a fin against the water, a gray whale swam.
A gray whale was swimming through the ocean, slapping its fin against the water.
Slapping its fin against the water, a gray whale has been swimming through the ocean.
A gray whale slapped its fin, swimming through the ocean, against the water.