Question
13 to 20 are based on this passage
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Question 13
Proponents of the uniformitarian view would most likely argue that
A. the clay layer actually contained foram too small for Alvarez to detect
B. the absence of foram suggested a mass extinction
C. iridium could likely be found in the clay layer
D. that the lack of forams in the clay reflected a gap in the fossil record
E. the orientation of the earth’s magnetic field is capable of reversing
我的答案： 无