Which One of the Following Is Definitely an Example of Affect

Which one of the following is definitely an example of affect as psychologists use the term?

A) Jack wonders why people who live in Australia and New Zealand don't fall off the earth into outer space.
B) After considerable effort,Ramona finally finds the error she made in her solution to a mathematical word problem.
C) Charles can't remember where he left the backpack he takes to school each day.
D) Darby is outraged when she reads about various instances of "ethnic cleansing" in seemingly civilized countries.