Answer:
The third option
Step-by-step explanation:
The conspiration against Caesar takes its origin in the great ambititious nature of Caesar. They are convinced that the sake of Rome is in danger due to his lack of honor and high corruption. The idea of a "serpent's egg" that could grow "mischievous" refers to the possible threat that a bad ruler might represent. Accordingly, the conspirators consider the action of taking Caesar's life as the only option to protect Rome.