Ireally need to ace this

1.
which of the following is an example of the principle of checks and balances?
a. presidents can veto an act of congress.
b. members of congress have the power to raise their own salaries.
c. federal courts have the power to hear cases involving federal law.
d. presidents can appoint officers of the armed forces.

2.
which branch of government has the power to make laws?
a. executive
b. federal
c. judicial
d. legislative

3.
the u. s. government is divided into three branches. what is this an example of?
a. federalism
b. interpretation
c. separation of power
d. confederate system