need help with astronomy hwk plz and thank you?

[h t]

1)The pulsation periods of most pulsars are in the range
A) of 1/1000 second and a few seconds.
B) of 10-6 and 10-3 second.
C) from minutes to hours.
D) from many hours to a few days.

2)Einstein's principle of equivalence in his general theory of relativity asserts that
A) the behavior of all types of atoms in a gravitational field is equivalent.
B) all objects are attracted toward all other objects in the universe by gravitational forces.
C) being at rest in a gravitational field is equivalent to being in an upwardly accelerated frame of reference in a gravity-free environment.
D) if person B is in a rapidly moving reference frame (moving at constant velocity), then person B will observe exactly the same effects for person A as person A observes for person B.