单选题Sugar manufactures have ______.A tried hard to make experiments on their own with sugar on humans and animalsB invested millions of dollars in buying best names of scientists to sell sugar.C hoped to encounter some scientific findings about sugar.D tri
题目
单选题
Sugar manufactures have ______.
A
tried hard to make experiments on their own with sugar on humans and animals
B
invested millions of dollars in buying best names of scientists to sell sugar.
C
hoped to encounter some scientific findings about sugar.
D
tried hard to establish public relations in order to open the market for sugar.