Read the sentence below and answer the question.
during the school year, cassie struggled with several subjects, including performing on math tests, to develop good work habits and studying every
(the underlined section is in colons)
which substitute for the underlined part of the sentence is most effective in correcting its structure?
to perform on math tests, to develop good work habits, and studying every night.
to perform on math tests, to develop good work habits, and study every night.
performing on math tests, developing good work habits, and studying every night.
leave as is.

Armed with invisible ink, a cipher system, and a passion to end the war and preserve the union, elizabeth van lew became butler's eyes and ears in the confederate capital city. truth be told, however, she became much more than that. she became a spymaster, the person responsible for running a network of agents, couriers, and safe houses that was very active during the war. in addition to the spying, elizabeth van lew continued to maintain her church hill home as a safe house and something of a local union spy headquarters. —the dark game, paul janeczko what is the central idea of this passage? van lew’s home was used as a safe house, which was critical to the confederacy. van lew had a passion to end the war and preserve the union. van lew was a spymaster, a leading force in the espionage activities for the union. van lew did not enjoy working for general butler.