单选题 An analyst gathered the following information about the monthly returns over the same time period from two diversified investment portfolios:

	portfolio X	portfolio Y
Mean	1.2%	1.2%
Median	1.1%	1.3%
Mode	1.0%	1.4%

The analyst stated that Portfolio X is negatively skewed and Portfolio Y is positively skewed. Is the analyst correct with respect to: Portfolio X? Portfolio Y? ①A. No No
②B. No Yes
③C. Yes No
A．① B．② C．③