Multiple Choice
Material objects cannot be accelerated up to lightspeed because
A) of the curvature of space, which increases toward infinite curvature as the object approaches lightspeed.
B) their length decreases [toward zero] as they approach lightspeed.
C) their inertia increases [toward infinity, i.e., without bound] as they approach lightspeed.
D) nothing can move at the speed of light.
E) Nonsense-- objects can be sped up to lightspeed, as we can see from the example of light itself.
Correct Answer:

Verified
Correct Answer:
Verified
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