Question

Which sentence uses commas correctly?

A.
Seaweed floats in the ocean, and some kinds can be harvested for food.

B.
Volcanoes spew molten rock and, they mostly exist along the Pacific Rim.

C.
Computers are useful tools, and, they are becoming more powerful every year.

D.
The blue whale is the largest animal on Earth and it is larger than any of the prehistoric dinosaurs.

Answer 1

b

Answer 2

medal