Answer:
a. The Special relativity postulate states that the laws of physics apply in all inertia frames of reference
b. General relativity must be uses a curved space-time
c. Time is dilated for a stationary observer relative to one in motion
Time interval observed on an object in a moving frame of reference is less than the same interval observed on a stationary reference frame

Length is contracted
The length of a rod moving with a velocity relative to an observer will appear contracted by a factor
, in the direction of the motion.
Step-by-step explanation: