In Relativity,two People Share the Same Frame of Reference Only

Multiple Choice

In relativity,two people share the same frame of reference only if

A) they are not moving relative to each other.
B) they are both located in the same place.
C) they are both located in the same place and are traveling at the same speed.
D) they are both located in the same place and are stationary.
E) they agree on the laws of nature.