Which did President Nixon support during his first term?

What event started the space race and made americans feel their security was threatened a.) alan shepard's suborbital flight. b.) the launch of sputnik c.) the launch of explorer d.) the cuban missle crisis

What do u think caused the size of the roman empire to change

Demographers can compare a choropleth map to a to understand how geography influences population distribution and there are no a,b,c,or d u have to find it out ur self asap