Two objects at rest are both measured to be 1 meter in length. The first object begins moving at 0.5c and the second object moves at 0.75c. Which of the following is true regarding these two objects? a the perceived length of each object is the same as the length of when they are motionless b the perceived length of object 1 is longer than the perceived length of object 2 c the perceived length of object 2 is longer than the perceived length of object 1 d the perceived length of object 1 is the same as the perceived length of object 2