An analyst gathered information about thre

问题：

An analyst gathered information about three economic variables. He noted that whenever variable A increased by one unit, variable B increased by 0.2 units but variable C decreased by 0.7 units. The correlation between variables A and B and the correlation between variables A and C, respectively, are closest to: Correlation between variables A and B Correlation between variables A and C（）

A. 1.0                   -1.0 

B. 1.0                   -0.5 

C. 0.5                   -1.0