In General,which of the Following Statements Is Correct

In general,which of the following statements is correct?

A) Most stimuli will gradually develop the ability to elicit a conditioned response.
B) Few stimuli will gradually develop the ability to elicit a conditioned response.
C) Salient stimuli do not rapidly become associated with particular unconditioned stimuli.
D) Non-salient stimuli often become associated with repeated conditioned stimuli-unconditioned stimuli pairings.