Anya is sending a persuasive memo to her staff asking them to participate in the new wellness program.Which of the following sources of information would be most appropriate to help Anya shape an effective persuasive message for her staff？（）

Anya is sending a persuasive memo to her staff asking them to participate in the new wellness program.Which of the following sources of information would be most appropriate to help Anya shape an effective persuasive message for her staff？（）
A.Research in company files
B.Library research rooms
C.Questionnaires and surveys of employees
D.Tightly controlled scientific experimentation
正确答案：Questionnaires and surveys of employees