Answer: C.one product and multiple market segments.
Explanation:
Sporting News Baseball Yearbook is using the One Product and Multiple Market Segments marketing strategy.
By using the SAME story but putting a DIFFERENT star in each cover to cater for DIFFERENT segments across the nation, they are hoping to Target multiple segments with the same product.
This Marketing strategy boosts sales while keeping Differentiation costs at a minimum because the product need not be differentiated to cater for different segments, only the market strategy needs to.