I'm assuming that this is out of a passage. I can't answer the question without the passage.
Answer:
i think c
Explanation:
most people feel discouraged at practice but it could also be d because the coaches sure do work us hard!!
Answer:
noun and a verb or predicate and subject
Explanation:
For me, the answer is letter D.
Only choice D has the technical words associated to geography. The rest of the choices contain common words that any mundane could use. But choice D talks about geology itself in the ocean which is highly influenced by drilling and mining. Knowledgeable readers would understand this because drilling and mining require workers to tap into the geological rocks deep beneath the ground which may cause a significant alteration in the oceanic geology.