Which concept was supported by taking measurements of the same stars at night and then again during solar eclipses?

gravitational lensing

principle of equivalence

gravitational time dilation

gravitational redshift

The concept of gravitational lensing was supported by taking measurements of the positions of stars at night, and then measuring the positions of the same stars again, several months later, during solar eclipses.

Hi! The answer would be letter A.

Explanation:

Gravitational lensing is a distribution of matter between a distant light source and an observer. This makes it capable to bend the light from the source as the light travels towards the observer. Therefore, the concept that supports taking measurements of the same stars at night and then again during solar eclipses would be gravitational lensing.