This is the statement that offers the most relevant evidence to support the argument that background noise interferes with short-term memory when students read prose. Option C states that students who read in silence scored better on a particular test than those who read with background noise. Therefore, the implication is that the students were affected by the noise, which meant they could not concentrate on the test properly.
It is called - omission. If you leave details out, you omit them. The other options don't fit: hyperbole means exaggeration, parody is ridicule, and diction is the choice of words.
