In problem solving, a method that always produces a problem solution (though not necessarily very efficiently) is known as

Which of the following drugs is a diuretic?

A) alcohol B) marijuana C) nicotine D) morphine E) cocaine

Studies have shown that with consistency, variation of characteristics within national samples is typically ______ the differences between any two national samples.

A. lesser than B. greater than C. equal to D. not enough to justify