In which of the following groups are the formal and informal leaders of the same people, at least at the beginning of the group?

a. school admin
b. family
c. circle of high school friends

Which of the following activities would conserve the most energy? installing a dimmer switch on a light using a blender instead of a food processor hanging clothes to dry on a clothesline instead of ironing them opening a window instead of turning on the air conditioning setting your computer's screen saver to turn on after less time has elapsed