Read the following sentences.

The ocean is the habitat of many types of fish. The ocean is a wide expanse of salt water.

Which revision uses an appositive to combine these two sentences correctly?

A The ocean, a wide expanse of salt water, is the habitat of many types of fish.
B The ocean is the habitat of many types of fish because it is a wide expanse of salt water.
C The ocean is a wide expanse of salt water, and many types of fish live there.
D The ocean is the habitat of many types of fish, which enjoy the wide expanse of salt water.