Answer:
C.
Explanation:
the importance was high to people in California of solar power, I took the same quiz
c
one effect many causes
Answer: B
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'
decisions was the phrase