An argument can be sound (in the technical sense used in this course) when
A.
its premises and conclusion are both true.
B.
its premises are conclusion are both false.
C.
its premises are false, and its conclusion is true.
D.
its premises are true, and its conclusion is false.
E.
more than one of the above. (That is, a sound argument can have more than one of these combinations of truth values.)