One way to speed up the acquisition of classically conditioned response is to INCREASE THE INTENSITY OF BOTH THE CONDITIONED STIMULUS AND UNCONDITIONED UNCONDITIONED STIMULUS.
Acquisition refers to how learned responses are strengthened or changed over time. Classical conditioning refers to the learning process which occur when two stimuli are repeatedly paired. In order to increase the rate of learning [acquisition], the intensity of both the condition and unconditioned stimulus can be increased.