4.
What is the correct way to write sentence 8?

Next, the people allowed the beans to ferment and dry in the sun they also roasted them in a gentle fire to coax out their amazing flavor.

Next, the people allowed the beans to ferment and dry in the sun; they also roasted them in a gentle fire to coax out their amazing flavor.

Next, the people allowed the beans to ferment and dry in the sun, also roasting them in a gentle fire to coax out their amazing flavor.

Next, the people allowed the beans to ferment and dry in the sun, roasted them in a gentle fire to coax out their amazing flavor.