The answer is --------- B. Review your results
How old is sarah
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Answer:
1 The computer scientists check the database for viruses
2 Nanotechnology is difficult to understand
3 The geologists study the structure and formation of the earth.
4 One is concerned with the question of whether cloning is ethica
5 In the past few years genetic researchers have made incredible strides
6 An international research team is planning a trip to Mars
