During a total solar eclipse in 1919, we found evidence that supported the General Theory of Relativity. What observation was made?

During a total solar eclipse in 1919, we found evidence that supported the General Theory of Relativity. What observation was made?

A. The energy measured was consistent what is predicted with E=mc2

B. the Suns gravity bent the light from a bright star the amount predicted by the theory

C. Mercury's orbit slowed down as predicted by the theory due to time dilation

D. The Suns radius shrank as the theory predicted with length contraction