In the Study by Dunn, Aknin, and Norton, What Occurred

In the study by Dunn, Aknin, and Norton, what occurred with participants who were instructed to spend money on someone else?

A) They were not as happy as others who spent money on themselves.
B) They had higher well-being at the end of the day.
C) They did not express either positive or negative emotions about it.
D) They were satisfied if they also spent an equal amount on themselves.