You can break a long line of code into multiple lines by and then continuing writing code on the next line.

Hypothesis: volumes of both figures are equal.the volume of  figure 1 is: .the volume of figure 2 is: .since , you can conclude that and . so, .volumes of figures are equal only when an angle in the basis is right (then figures will be the same), in another cases volume of figure 1 is less than volume of figure 2.the hypothesis was not correct in all cases.

Ocr stands for optical character recognition. so the choice is straight forward.

A. save and previewb. edit and proofc. save and proofd. save and merge all