Dr. Garcia is known for his difficult pop quizzes. Immediately before he springs a pop quiz on his students, he typically goes to the classroom door and closes it, and his students begin to feel anxious and tense. Students soon learn to anticipate a pop quiz and feel anxious whenever Dr. Garcia closes the classroom door. Closing the door has become a(n): .
a) conditioned stimulus
b) unconditioned stimulus
c) unconditioned response
d) conditioned response

Describe some effects of the rise of communism in the soviet union?

1.how is germany's economic system similar to that of the united kingdom a. both are free-market economic b. both are command economic c. both are mixed economic d. both are traditional economic

Jackie went to the grocery store to pick up yogurt, bread, and apples. first, she picked up a hand basket for carrying her groceries, and then she searched the store. after finding what she needed, she stood in a check-out line. then, the cashier put her items in a plastic bag, and soon after, jackie left the store. as readers of this event, we understand that jackie paid for the groceries, even though it wasn't mentioned, because we are relying on a grocery store