单项选择题

Among the following research methods，which one is cheaper and easier？（）

A.Opinion-based research method.
B.Quantitative research method.
C.Observational research method.
D.Experimental research method.

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A.demand for ice cream cones in this price range is elastic.
B.demand for ice cream cones in this price range is inelastic.
C.demand for ice cream cones in this price range is unit elastic.
D.price elasticity of demand for ice cream cones in this price range is 0.

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外语考试试题及答案解析

Among the following research methods，which one is cheaper and easier？（）