Were there any answer choices for it? If not it would just be they wouldn't get a lot of laws or bills passed because of Congressional opposition.
The correct answer is a testable idea.
A Hypothesis is a assumed explanation for a certain event or phenomenon. For a hypothesis to be accepted for scientific research, first and foremost, the hypothesis should be able to undergo research or testing. It must hold the element of being testable for it to be proven.
If this is an actual problem you need to add more
Extraneous
An <em>extraneous variable</em> is a variable in an experiment that you are not intentionally studying. These variables usually provide undesired affects on the experiment.
In this example, the independent variable is whether a sentence is humorous or not, and the dependent variable is the memory performance score. However, because the humorous sentences are only given to males, and the non-humorous sentences are only given to females, gender becomes an extraneous variable as you are not intentionally testing gender's relation to the dependent variable, but it is still affecting the experiment.