the only likable -looking suitable answer choices here are B and E as ones introduce example illustration made with firms, further in the sentence, "such firms"
which firms? - such firms.
where can we read about firms only in B and E, otherwise "such firms" is meaningless part in this sentence
but E makes illogical precedence with "firms" --> "for firms' survival" lays ground for speaking not exactly about the firms - we can speak and bring examples about anything related to these firms and an electronics industry;
choice B makes clear precedence for the rest of the sentence.
atulmangal wrote:Because of the enormous research and development expenditures required to survive in the electronics industry,
an industry marked 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
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