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Wawira bought x mangoes and her friend Awino bought y mangoes. Halima bought 5mangoes less than the number of mangoes both Wawira and Awino bought. Which one of the following expressions represents the total number of mangoes the three girls bought?
A.2x+2y+2
B.2x+2y-5
C.2x+2y-3
D.2x+2y+7