For this exercise, identify the single organizing principle for each of the following groups:

1			spring, summer, autumn, winter. The topic is holidays. The SOP is:
			A)	temperature
			B)	seasons of the year
			C)	age
			D)	months
2			parents, cousins, brothers. The topic is family. The SOP is:
			A)	kinds of relationship
			B)	hair color
			C)	temperature
			D)	weight
3			explosions, gun fire, punching. The topic is attacks. The SOP is:
			A)	motivation
			B)	speed
			C)	color
			D)	loudness
4			French, Greek, Mexican, Thai. The topic is food. The SOP is:
			A)	color
			B)	cooking time
			C)	price
			D)	types of cuisine
5			superstars, stars, everyday players, bench players. The topic is baseball players. The SOP is:
			A)	experience
			B)	age
			C)	salary
			D)	friendliness
6			cautious, aggressive, angry, psychotic. The topic is drivers. The SOP is:
			A)	temperament
			B)	age
			C)	experience
			D)	responsibility
7			slackers, just getting by, hard workers, nerds. The topic is students. The SOP is:
			A)	responsibility
			B)	gender
			C)	hair color
			D)	intelligence