Over a six-month period, an observer on the Earth records the position of a nearby star. The observer notes that at the

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Over a six-month period, an observer on the Earth records the
position of a nearby star. The observer notes that at the end
of the six-month period the star has slightly shifted its position
in the sky. This observed shift in the star’s position could
allow the observer to determine the Earth’s
A. radius.
B.orbital tilt.
C. rotation rate.
D. mass.
E. distance from the star.