What three factors are found in the system of checks and balances?

A-Congress may override a veto with three-fourths vote.
B-The president can veto legislation passed by Congress.
C-The Supreme Court may override a veto by three-fourths vote.
D-Congress has the power impeach the president for misconduct.
E-The president can only veto legislation passed by Congress with less than two-thirds vote in both houses.
F-The Supreme Court may declare laws unconstitutional.