[单项选择]While the polltakers are most widely known for their political surveys, the greatest part of their work is on behalf of American business. There are three kinds of commercial surveys. One is a public relations research, such as that done for banks, which finds out how the public feels about a company. Another is employee-attitude research, which learns from rank-and-file workers how they really feel about their jobs and their bosses, and which can avert strikes by getting to the bottom of grievances quickly. The third, and probably most spectacular, is marketing research, testing public receptivity to products and designs. The investment a company must make for a new product is enormous--$ 5,000,000 to $ 10,000,000, for instance, for just one new product. Through the surveys a company can discover in advance what objections the public has to competing products, and whether it really wants a new one. These surveys are actually a new set of signals permitting better communication between
A. cause and effect
B. contrast
C. illustrations
D. anecdotes