In doubles play, the player serving: a
take turns serving after every point
b
will serve the entire game
c
take turns serving every 2nd serve
d
None of the above

b

Explanation: the server serves for an entire game until they switch to the opponents serving.

the gravitational force on an object increase as the mass of an object also, im not going to report you, but this question should be under the science category, not health

yes. i think it is for sure.