McDonald′s，Greggs，KFC and Subway are today named as the most littered brands in England as Keep Britain Tidy called on fast-food companies to do more to tackle customers who drop their wrappers and drinks cartons （盒子）in the streets.
Phil Barton，chief executive of Keep Britain Tidy，__62__its new Dirty Pig campaign，said it was the first time it had investigated which __63__made up “littered England”and the same names appeared again and again.
“We __64__letterers for dropping this fast food litter __65__the first place but also believe the results have pertinent （相关的）messages for the fast food __66__.Mc-Donald′s，Greggs，KFC and Subway need to do more to __67__littering by their customers.”He recognised efforts made by McDonald′s，__68__placing litter bins and increasing litter patrols，but its litter remained “all too prevalent”.All fast food chains should reduce __69__packaging，he added.Companies could also reduce prices __70__those who stayed to eat food on their premises，offer money-off vouchers （代金券）or other __71__for those who returned packaging and put more bins at __72__points in local streets，not just outside their premises.A __73__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__74__in Manchester and Birmingham.
KFC said it took its __75__on litter management “very seriously”，and would introduce a programmer to reduce packaging __76__many products.Subway said that it worked hard to __77__the impact of litter on communities，__78__it was “still down to the __79__customer to dispose of their litter responsibly”.Greggs said it recognised the “continuing challenge for us all”，__80__having already taken measures to help __81__the issue.

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