(b) Explain the following statements regarding consideration:(i) consideration must be sufficient but does not have to be adequate; (3 marks)(ii) past consideration is not good consideration. (4 marks)

差压变送器测量容器液位时的输出电流反映的是液位的（）。

A、实际高度

B、测量点到液面高度

C、容器总高度

D、容器底部到测量点高度