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.