Okay, so this one asks us, behaviorism was a particularly dominant field of psychology from approximately which date? So behaviorism was really big from about 1920 to about 1950. Based on that, it looks like our answer is going to be b. One way to maybe help yourself remember that is that 1950 was obviously the midpoint or like the turning point of the century, and behaviorism dying out was really a big turning point for psychology. As behaviorism declined in popularity, it left room for all the other subfields of psychology that now are very prominent today to rise up and take its place. So, turning point of the century, turning point in psychology, that nice kind of midway point there.

Alright, so our answer here is b. There you go.