A planet is discovered at a distance of 1 AU from its parent star with a period of 2 years. How does the star's mass compare to our Sun's?
A. The star's mass is around 2 times smaller than the Sun's.
B. The star has the same mass as the Sun.
C. The star's mass is around 4 times larger than the Sun's.
D. The star's mass is around 2 times larger than the Sun's.
E. The star's mass is around 4 times smaller than the Sun's.
Answer: E
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