Q1092
The Cambrian . . . . . . . . an important moment in the history of life on earth and a time of radical evolutionary experimentation when many animals first . . . . . . . . in the fossil record.
A.
was/had appeared
B.
has been/will appear
C.
has been/appears
D.
is/appeared
E.
was/appeared
AnswerAnswer: Option E
Solution
Answer: Option E
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