Which of the following is an indication that a planet may exist near a distant star

A. the star varies in temperature
B. The star has a very slight back and forth motion
C. the star has very strong gravity
D. Radio wave activity increases near the star

I think the answer is A

6 answers

i think the answer is c
its b
its b
it's b i did the test
The answer is B👈
lo 223