Answer:
The faster an object moves, the more stretched time becomes.
Step-by-step explanation:
The difference between the time elapsed between two events is called time dilation. If t' is the time measure in a moving frame, it is given by :

t is the proper time
It is also defined as the slowing in time when viewed from a moving frame of reference. When there is a relative motion between two objects, the time gets stretched as per special theory of relativity. So, the correct option is (a).