如图所示电路中，当滑动变阻器的滑片P向右移动时

A．灯L变亮，V示数变大

B．L变暗，A示数变小，V示数不变

C．L变亮，A示数变大，V示数不变

D．L变暗，A示数变小，V示数变小

It can be inferred from the passage that, in the early spring, the buds of plants ______

A．"export" protein in the form of amino acids

B．do not require water

C．have begun photosynthesizing

D．obtain organic compounds from the root