Marketing Synergies Often Come at the Expense of Product Synergies

Marketing synergies often come at the expense of product synergies because

A) product synergies are more effective for penetrating a market rather than creating a new one.
B) a multiple market segment would usually require multiple products.
C) it is easier to change a product than to completely build a new marketing plan.
D) a single customer segment will likely require a variety of products.
E) no company can afford to do both at the same time.