Participants Who Are Studied Under a Serial Reaction Time Test

Participants who are studied under a serial reaction time test are shown five boxes on a computer screen. When a box lights up, they are to click it as quickly as possible. The boxes seemingly light up at random, but a pattern exists. Over time, participants respond _____ on this task _____ of the pattern.

A) more slowly; and are unaware
B) more carefully; and become aware
C) more quickly; but are unaware
D) more quickly; and become aware