Answer:
B. Market Development
Step-by-step explanation:
Market development is a growth strategy that identifies and develops new market segments for a product.
In this question, yes the cereal is mostly consumed at breakfast, but the Kellogg's Oat Bran is developing the market by portraying the Oat Bran as a snack rather the breakfast.
Targeting and developing the new customers to be the consumer of the product is at the heart of the strategy.
In a way, it's about literally developing the market for your product is not currently your consumer yet.