35% of major airline companies equip their planes with wireless internet access. 70% of major airlines offer passengers free on-board snacks. What is the greatest possible percentage of major airline companies that offer both wireless internet and free on-board snacks? Choose the correct choice from the following:
A) 25 %  B) 35 %  C) 45 %  D) 55 %  E) 65 %

Rationale: "to maximize the percentage of companies offering both , let ' s assume that all 35 % of companies which offer wireless internet also offer snacks . the answer is b ."
Answer: B