Which of the following is the best way to describe Einstein's First Postulate of his Special Theory of Relativity? a Every object in the universe can be put on this space-time continuum in terms of position and time in history. b All observers regardless of the speed of the source or the observer will always measure the speed of light to be the same. c There are no experiments that can be done to detect uniform motion, only accelerated motion d The age of a traveler will be slowing down on the outgoing trip, but speed up on the return trip thus will not age differently than a stationary non-traveler