Answer: The right answers are:
B. Those who did well under the previous leader become enemies.
C. The introduction of new rules and methods is hard for people to take.
D. Those who may do well under the new prince are weak defenders.
E. It is dangerous to take the lead in the introduction of a new order.
Explanation: Just to elaborate a little on the answer, it can also be added that the speaker argues that innovators have for enemies "those who have done well under the old conditions," and for weak defenders "those who may do well under the new." This is expressed in options B and D, respectively. In addition, he also says that there is nothing "more perilous to conduct" than "to take the lead in the introduction of a new order," as it is expressed in option E. Finally, it is also possible to infer from the excerpt the general idea that introducing new rules and methods is not easy for people to accept, hence the difficulties that it represents.
