|Question 3Verbal

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Text
Economists often assert that countries looking to increase their reliance on solar energy should expand their capacity for storage having an ample reserve of stored energy can mitigate the effects of        solar energy collection caused by unpredictable shifts in cloud cover and haze.
Which choice completes the text with the most logical and precise word or phrase?
calibrations with
A
fluctuations in
B
developments of
C
incentives for
D