OG 181
Because of the enormous research and development expenditures required to survive in the electronics industry, an industry marked by by rapid innovation and volatile demand, such firms tend to be very large.
A. to survive
B. of firms to survive
C. for surviving
D. for survival
E. for firms' survival
被required of fims to surive的用法彻底弄晕了。请教一下nn题目的翻译!谢