What is the cell theory

Lola needs to sign 6 invitations. using stopwatch that measures time to tenths of a second, it takes lola 5.3 seconds to sign her full name. going by the accuracy of the stopwatch, which is the most accurate determination for the number of minutes lola needs to sign all 96 invitations

Which description provides the best objective summary of the article in the passage?

How can we use spectral lines of light coming from the superclusters to identify which is receding from earth at the slowest rate.