Mark the letter A, B, C, or D to indicate the word(s) CLOSEST in meaning to the underlined word(s) in each of the following questions.
Environmentalists dedicate a lot of their time to running campaigns to raise people’s awareness about protecting endangered species.
A.eliminate
B.save
C.devote
D.waste
No matter what I said to him, he still did not believe me. He is certainly a hard nut to crack.
A.obstinate
B.controversial
C.insatiable
D.obsolete