Each of the Following Is a Prediction of the Theory

Multiple Choice

Each of the following is a prediction of the theory of relativity (special or general) .Which one is crucial to understanding how the Sun provides light and heat to Earth?

A) Gravity is curvature of spacetime.
B) E = mc²
C) If you observe someone moving by you,you'll see his/her time running slow.
D) Space is different for different observers.Time is different for different observers.Spacetime is the same for everyone.