The correct word in the set would be ingenious.
The telephone is an ingenious invention. That means that it is very clever or innovative.
Ingenuous means innocent, sincere.
I would say it involves extensive research
This was very tough between b and c but im gonna have to say its b because its more literal than c is
Antony's speech is a turning point for the conspirators. Caesar has been murdered, and the conspirators have explained the situation. Although Antony does not openly disagree with them, we see that he believes the act was wrong when he adresses the crowd. Brutus has already talked to the people, and he argued that Caesar was killed out of love for Rome. Antony, however, turns the crowd against them. He reminds the people of everything that Caesar did for Rome. By carefully presenting his arguments, he succeeds in turning the crowd against the conspirators.
B because the other ones make sense and are not choppy, but B is.
