Phil Barton, chief executive of Keep Britain Tidy, 【C1】______ its new Dirty Pig campaign, said it was the first time it had investigated which 【C2】______ made up "littered England" and the same names appeared again and again. "We 【C3】______ litterers for dropping this fast food litter 【C4】______ the first place but also believe the results have pertinent (相关的) messages for the fast food 【C5】______ McDonald's, Greggs, KFC and Subway need to do more to 【C6】______ littering by their customers".
He recognised efforts made by McDonald's, 【C7】______ placing litter bins and increasing litter patrols, but its litter remained "all too prevalent". All fast food chains should reduce 【C8】______ packaging, he added. Companies could also, reduce prices 【C9】______ those who stayed to eat food on their premises, offer money-off vouchers(代金券) or other 【C10】______ for those who returned packaging and put more bins at 【C11】______ points in local streets, not just outside their premises. A 【C12】______ for McDonald's said: "We do our best. Obviously we ask all our customers to dispose of litter responsibly", Trials of more extensive, all-day litter patrols were 【C13】______ in Manchester and Birmingham. KFC said it took its 【C14】______ for litter management "very seriously", and would introduce a programme to reduce packaging 【C15】______ many products. Subway said that it worked hard to 【C16】______ the impact of litter on communities, 【C17】______ it was "still down to the 【C18】______ customer to dispose of their litter responsibly". Greggs said it recognised the "continuing challenge for us all", 【C19】______ having already taken measures to help 【C20】______ the issue.
【C1】

A. elevating
B. launching
C. convening
D. projecting