Reading Comprehension (RC) | Re: The life cycle of a product depends on its market share, growth and co

Need help with question A - difficulty choosing b/w B and C.
I chose C

Can someone please breakdown the question and explain the 2 choices.

Q1. The author uses the words usually and certain to emphasize that


(A) most products only enjoy a modest measure of commercial success
(B) the life cycle, as it is described in the first paragraph, is not universal
(C) one cannot predict whether a product will be successful or not
(D) companies that employ market research enjoy more success than those
...

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