Need help with the problem ASAP!! Find valid conclusions using all the premises. (Select all that apply.)

All politicians run for office.

All people who run for office are reliable.

A. All politicians are reliable.

B. No politicians are reliable.

C. All reliable people are politicians.

D. No reliable people are politicians.

E. All people who are not reliable are politicians.

(My teacher said that there are three valid conclusions.
"2nd, 4th and 5th. You have a chain pattern here. But you also need to consider the contrapositive of the chain pattern conclusion".)