Answer:
A, B, C
Step-by-step explanation:
A: A bill can be introduced by a senator or representative who sponsors it; he who sponsors it is the senator himself.
B: When a committee orders a bill reported, some steps are taken that will result in another version of the bill and a committee report
C: A president cannot ignore the Congressional override of his veto - an act that seldom occurs. The Congressional override requires a two-thirds vote in each chamber.