USWine Producers Only Export About 14 Percent of Their Total

U.S.wine producers only export about 14 percent of their total annual production of wine.They would like to sell more to overseas markets,but do not want to tailor their wines to consumers' palates.For example,Californian wines are typically heartier and richer than Europeans like to drink.
-Refer to U.S.Wine.U.S.wine makers are not having much success in selling their wines in Europe due to differences in which environment?

A) demographic
B) economic
C) cultural
D) political