In the following passage some of the words have been deleted. Read the passage carefully and select the correct answer for the given blank out of the four alternatives.

The study published today in a magazine, finds that kids ( I) __________ played only individual sports, like tennis or gymnastics, tended to (2) __________ more mental health difficulties. As a researcher, Hoffmann has long been interested in how sports (3) __________ the psychological health of young people, partly because studies have (4) _________ both positive and negative associations between mental health and sports (5 ) _________ in children and adolescents.