The phrase in the capital words is A. an adjective phrase.
What kind of city? The city of Arizona.
Adjectives are used to describe the nouns.
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'
