What Is the Difference Between an Argument and an Explanation

What is the difference between an argument and an explanation?

A) An argument requires two people, but an explanation only requires one.
B) An explanation is much longer than an argument.
C) An explanation provides much more detail about a situation than an argument.
D) An explanation is simply an argument that has been written out in paragraph form.
E) An argument reasons forward from premises to conclusion, but an explanation reasons backward from a fact to its cause.