Which BEST explains Parmenides's theory about being? A. There is being because there are four elements.
B. There is no such thing as being, and life is an illusion.
C. There are ways of knowing being and ways of knowing non-being.
D. There is no such thing as non-being, so everything is a state of being.

During the apollo moon missions, astronauts were concerned about the effects of newton's third law of motion when: o a. they ejected waste water, because they were concerned that it would push them off course. o b. they reentered earth's atmosphere, because they were carrying heavy moon rocks. o c. they took off from earth, because a large force was required to generate large acceleration. o d. they detected incoming space debris, because the inertia of the debris could damage their ship.