真心求教如何做逻辑must be true 的题

xiaoxiaoliang

例如GWD第三套第32题Q32:GWD-4-8From1980 to 1989, total consumption of fish in the country of Jurania increased by4.5 percent, and total consumption of poultry products there increased by 9.0percent.  During the same period, thepopulation of Jurania increased by 6 percent, in part due to immigration toJurania from other countries in the region.

If thestatements above are true, which of the following must also be true on thebasis of them?

A.    Duringthe 1980’s in Jurania, profits of wholesale distributors of poultry productsincreased at a greater rate than did profits of wholesale distributors of fish.
B.     Forpeople who immigrated to Jurania during the 1980’s, fish was less likely to bea major part of their diet than was poultry.
C.    In1989 Juranians consumed twice as much poultry as fish.
D.    Fora significant proportion of Jurania’s population, both fish and poultryproducts were a regular part of their diet during the 1980’s.
E.     Percapita consumption of fish in Jurania was lower in 1989 than in 1980.
A为什么错了。。。。为什么选D啊求教求教