Read the article and select the best answer. Article: A group of British schools are banning skirts after helplessly watching the fashion of "hemline _ creep" when girls roll up skirts to show more of their legs.Rising hemlines among girls in their midtolate teens have long been a headache for schools.Now,it seems,girls who are leaving homes with perfectly proper skirt lengths manage to transform their uniform into microminiskirts by the time they get to school. Some are so short that the headmaster of Tewksbury School in Gloucestershire said they are "almost like belts".Obviously,they have become a bit of a distraction for both boys and male teachers. Robert Kelly,headmaster of Berwickshire High School in Scotland,said short skirts could cause "inappropriate thoughts" among boys.And Hilary Winter,headmaster of Piggott School in Wargrave,Surrey,described short skirts as a "difficult distraction for members of staff ". In the town of Ipswich alone three schools have removed skirts from their approved uniform list.David Hutton,headmaster of Northgate High School,said,"Unfortunately,despite getting in touch with specific parents,sending some girls home to change,requiring others to wear a schoolowned skirt for the day and repeatedly asking others to unroll their skirts,we still had some girls coming to school in inappropriate skirts." "I have therefore introduced a trousersonly policy,which will enable my staff to focus their time and effort on providing students with the best education possible." Girls at Nailsea School near Bristol are used to a uniform ban.Two years ago,they were forbidden from wearing trousers made by the clothing brand Miss Sexy,which were reportedly too low on the hips and too tight."Staff were becoming embarrassed by seeing too much of the girls instead of the uniform,"headmaster David New said."They were very low, hipsterstyle,very tight trousers." Now they have been banned from wearing skirts. "We didn't want to waste any more time on it.It just means that teachers can concentrate on what's important in education,"New said. Megan... Question: What measure has Northgate High School taken to keep girls from wearing short skirts? Options: A: Asking parents not to buy skirts for their daughters any more. B: Keeping girls wearing inappropriate skirts out of school. C: Reminding girls not to roll up their skirts again and again. D: Permitting only a small number of girls to wear skirts at school.
Answer:
C