Choose the correct option.

There has been a dramatic increase ______ the price of oil.

Answer and explanation

Correct answer: A. in

  1. Step 1: Determine the correct preposition following nouns denoting upward or downward movement (such as "increase", "decrease", "rise", or "fall").
  2. Step 2: When specifying the area, category, or parameter that experiences the change, the noun "increase" is followed by the preposition "in" ("an increase in the price"). By contrast, "of" indicates the quantitative amount or magnitude of the change.
Answer
in.

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