在总账处理模块，对记账次数的要求是(  ) A.
每月只能记一次账 B.
每天只能记一次账 C.
月末时记一次账 D.
不受限制

A．To survey the potential consumers.
B．To describe strengths and weaknesses of a product.
C．To study the suppliers’ strategy.
D．To analyze the competitiveness in an industry.