One Saturday, Lacey was sitting at home when the telephone rang. A local company was making promotional calls and told Lacey she had just won a $1000 gift certificate. She felt a rush of excitement at the thought of what she could do with $1000. Now Lacey finds that whenever she hears a telephone ring, she feels a surge of excitement. In this example, the rush of excitement that Lacey felt when she heard she had won the gift certificate is .
a. the unconditioned stimulus
b. the unconditioned response
c. the conditioned stimulus
d. the conditioned response

The unconditioned stimulus

Explanation:

To begin with, stimulus (in this context), is a situation, agent or event that makes humans respond physically. Lacey's case is unconditioned because the response to the call that she won the gift certificate was automatic. In other words, the call was a stimulus that triggered an automatic and natural excitement in her.

dr. kings dream speech

explanation:

it was late in the day and hot, and after a long march and an afternoon of speeches about federal legislation, unemployment and racial and social justice, the rev. dr. martin luther king jr. finally stepped to the lectern, in front of the lincoln memorial, to address the crowd of 250,000 gathered on the national mall.