Which two methods can a reader use to identify the main idea of a text

the answer is:

b) to show the progression of inventions that took place in the bicycling industry.

hope it !

in macbeth, banquo, who in real life had willing in the murder of king duncan, is portrayed as a loyal subject of the king himself. many analysts believe that shakespeare had done this in order to king james, who supposedly was a direct descendant of banquo himself.

hope this ! : )