Why is the Atlantic Ocean growing larger, but the Pacific Ocean is growing smaller?

A. The Atlantic Ocean has more mid-ocean ridges than the Pacific Ocean so that keeps it growing larger.
B. The Atlantic Ocean is building more islands than the Pacific Ocean, so the continents are pushed apart more.
C. The Atlantic Ocean has more subduction areas, whereas the Pacific Ocean has more mid-ocean ridges.
D. The Atlantic Ocean has a spreading mid-ocean while the Pacific Ocean is subducting faster than the mid-ocean ridges make new land.