Cynthia’s psychology professor asks the class not to think about purple unicorns. Though Cynthia has never once before thought abouta purple unicorn, she finds that she cannot stop thinking about them. Cynthia is experiencing as a result of her attempts at .
a. the rebound effect; ruminationthe
b. rebound effect; thought suppression
c. distraction; rumination
d. distraction; thought suppression

Cynthia is experiencing b. rebound effect as a result of her attempts at thought suppression.

Explanation:

Thought suppression is the conscious, motivated way of trying to erase or remove a certain thought. This conscious activity often leads to the rebound effect, which creates the opposite outcome; the individual will most likely keep thinking about this specific thought.

In this case, Cynthia's conscious act of trying not to think about a purple unicorn, leads to the rebound effect, in which she cannot stop thinking about it.

watching over my siblings so they are safe.

in 342 bc j._c. egypt fell into the hands of the persians, under the reign of nectanebo ii

greek city-states unite in a revolt against the persian empire at the beginning of the fifth century bc. j.-c  

from the year 660 or 659 bc ad, cyrus preached the revolt against the medes to deliver the persians.