PLEASE HELP I DON'T KNOW THIS QUESTION I NEED HELP!! Two students below described a type of Earth's outermost layer:

Student A: 512 kilometers deep
Student B: Makes up the sea floor

Which type of outermost layer did the students describe?

A.) They both described the oceanic type.
B.) They both described the continental type.
C.) Student A described the oceanic type and Student B described the continental type.
D.) Student A described the continental type and Student B described the oceanic type.