What Is the Difference Between an Administrator and an Executor

What is the difference between an administrator and an executor?

A) Administrators administer trusts and executors administer wills.
B) Administrators distribute real property and executors distribute personal property.
C) Executors are used where the decedent has surviving children under age 18 and administrators are used where the decedent has no surviving children under age 18.
D) Administrators are appointed by the court and executors are named in the will.
E) Administrators are used for per capita distributions and executors are used for per stirpes distributions.