The original sentence has “…California is expected to see…blackouts on as many as 30 days…”. B has “as much as 30 days”. “Days” are countable, so “many” is used and not “much”. C has the same problem. D incorrectly eliminates the “on”. In E “blackouts for 30 days” changes the meaning, implying that a blackout may last 30 days. A is correct. Notice the redundancy is C’s “to be seeing”, rather than the shorter “to see”.
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