In 1981 children in the united states spent an average of slightly less than two and a half hours a week doing household chores; by 1997 they had spent nearly six hours a week. a) chores; by 1997 they had spent nearly six hours a weekb) chores; by 1997 that figure had grown to nearly six hours a weekc) chores, whereas nearly six hours a week were spent in 1997d) chores, compared with a figure of nearly six hours a week in 1997e) chores, that figure growing to nearly six hours a week in 1997