The term judicial review refers to the power of

A. the Supreme Court to declare laws unconstitutional, thereby striking them down.

B. Congress to declare laws unconstitutional, thereby striking them down.

C. the Supreme Court to review older court cases, making sure justice has been done.

D. the president to declare laws unconstitutional, thereby striking them down

Judicial review is a part of "checks and balances", that is the three branches of government checking on each other. The juidicial review is a power of the Supreme court (juidicial already suggests that it's the juicial branch that has this power) to check the work of the legislative branch - whether the laws written by the Senate and House of representatives are constitutional. The correct answer is therefore A.