Which of the following statements is TRUE about professor Kimballs survey？A．Some people do
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Which of the following statements is TRUE about professor Kimballs survey？
A．Some people don"t want to take it because it"s too time-consuming.
B．The results might not be objective enough.
C．The survey aims to measure Americans" happiness.
D．The survey has been conducted for three months.
请帮忙给出正确答案和分析，谢谢！