Until 2002, when Laconia became part of the tariff union, Laconia only allowed sales of domestic dairy products. Soon after, annual local sales of dairy products manufactured by Laconian dairy companies began to decline steadily. Even though Laconian dairies did not reduce their marketing and distribution efforts, the 2005 domestic sales of those companies were half what they had been before 2002. This provides grounds to hypothesize that by 2005 foreign manufacturers had taken over about 50 percent of the Laconian dairy market.
The hypothesis above depends on which of the following assumptions?
(A)After their country joined the tariff union, Laconians did not drastically decrease their consumption of dairy products.
(B)Between 2002 and 2005, several Laconian dairy manufacturers were forced out of business.
(C)In general, after Laconia joined the tariff union the number of foreign companies distributing their goods and services in Laconia increased.
(D)Between 2002 and 2005, foreign dairies increased their sales in Laconia each year.
(E)The variety of dairy products available in Laconia increased after the country joined the tariff union.