How can Malinda hold the respondents.interest in filling in the questionnaire? 选择一项： a. Provide variety in the type of questions. b. Keep the questionnaire short and simple. c. Keep the questions brief and easy to understand.

How can Malinda hold the respondents.interest in filling in the questionnaire?

选择一项：
a. Provide variety in the type of questions.
b. Keep the questionnaire short and simple.
c. Keep the questions brief and easy to understand.

出自：管理英语2

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