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4 votes
Why do scientific theories change over time?

Choose the best answer.

A. new technologies are developed
B. new discoveries are made
C. new research is conducted
D. all of the above

2 Answers

0 votes
New research is conducted, so it's C.
User Dieter Gribnitz
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6 votes
It is answer C which is new research is conducted.
User Chopper
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