Why Is It That We Can Use Response Latency as an Implicit

Why is it that we can use response latency as an implicit measurement of a participant's internal states? (circle all that apply)

A) people take longer to respond when they see something they do not like
B) it takes less time to respond when there are preexisting associations between stimuli in a participant's memory (i.e., the association is "automatic")
C) it takes more cognitive effort (and therefore a longer amount of time) to process information that seems contradictory or requires "thinking about it"
D) people respond faster when they do not have to be consciously aware of the stimuli that are presented to them