Explanation

Forecasting a company's revenue typically involves either top-down or bottom-up approaches.

• Option A (Net interest income): This is a bottom-up driver, as it is calculated based on account balances and revenue yields (e.g., loans multiplied by interest rates minus deposits multiplied by their interest rates).

• Option B (Growth in market share): This is a top-down driver. Analysts first forecast the growth rate of the company's product market and then assess the company's current and projected market share.

• Option C (Growth in the number of branches): This is also a bottom-up driver, as it is a capacity-based measure (e.g., retail stores or bank branches and their sales per unit).

Thus, Option B is the correct answer as it aligns with the top-down forecasting approach.