To assess whether mrs. webster had suffered a brain injury, researchers conditioned her to blink in response to a sound that signaled the delivery of a puff of air directed toward her face.
in this application of classical conditioning, the sound was a:

a) us. b) ur. c) cs. d) cr.

C) CS

Explanation:

Based on the information provided within the question it can be said that the sound was a conditioned stimulus. This term refers to a neutral stimulus that begins to trigger a conditioned response only after it is associated with an unconditioned stimulus. Which in this scenario they associated the sound with a puff of air (unconditioned stimulus) letting her know that she needed to blink.

c

explanation: because you need to reduce the pollution on land,the exhaust fumes will stop,and stop it in water,the oil that is in the oceanharms the fish   sorry if you   have been waiting long  

answer; the above statement is (true);