Which of the following are functions of the constitution?
a. establishing a structure for federal government and rules for amendments
b. providing procedural protections for u. s. citizens against wrongful government actions
c. granting specific powers for legislative, executive and judicial branches
d. a and c
e. all of the above

The answer is letter e. all of the above, since the Constitution functions to (1) establish a structure for the federal government and rules for amending the Constitution (stated in letter a); grant specific powers for the different branches of government (mentioned in letter c); and provide procedural protections for U.S. citizens from wrongful government actions (found in letter b).   It is stated in the preamble that the Constitution’s broad objectives is to set out structures, power, and procedures.

See attached file for the Overview of Articles in the U.S. Constitution.