Everyone who eats in Carman's Country Kitchen in South Philadelphia knows that if

you need a job,a place to stay or a friendly ear on a blue day,you come to Carman Luntzel.The six-foot,46 year-old powerhouse not only cooks,she also acts as her restaurant's discussion leader and matchmaker.When breakfast regular Stephen Sacavitch wasn't meeting women,she put his picture on a bulletin board,with the words:"Girls.Nice guy.Give him a break."Last September a coffeepot left on a red-hot burner nearly destroyed the restaurant.Luntzel didn't have insurance.But bad news has a way of turning good at Carman's.Bereft at the thought of no more buttermilk pancakes or homemade pear pie-and no more Carman dishing out advice and help-her customers pitched in.They boarded up her windows,removed debris and primed and painted her scorched walls.It wasn't just the regulars.A guy on a motorcycle dropped off some cash.A woman from a nearby restaurant scoured charred dishes and stuck two $50 bills in Luntzel's pocket as she left.Just three weeks after the blaze,Luntzel was serving breakfast again."It was incredible,"she says."There's a sense about Carman that is just can-do,"says regular Kevin Vaughan."It's infectious."

The word "powerhouse"in paragraph one means ()

A、a small powerplant

B、a good restaurant

C、an energetic person

D、an angry woman