Is the Primary Disadvantage of Employing a Market Specialization Strategy

is the primary disadvantage of employing a market specialization strategy?

A) Gaining market distribution will be costly.
B) The organization may be spread too thin.
C) The organization achieves neither marketing nor manufacturing synergies.
D) R&D-manufacturing has the difficulty of producing multiple products.
E) There are too many product substitutes over which a firm would not have control.