verb - descend a rock face or other near-vertical surface by using a doubled rope coiled around the body and fixed at a higher point.
noun - a descent made by rappelling.
Answer: B
Explanation:
A - 18 is not spelled out; should be 'eighteenth'
B - correct
C - no apostrophe in the decade; should be '50's'
D - name of the decade is spelled out; should be '1970s'
Answer:
C
Explanation:
A Nonrestrictive Clause is a type of an adjective that provides additional information about a word whose meaning is already clear.
