A House Plant Seems to Be Growing Slowly and Lacks

A house plant seems to be growing slowly and lacks its normal bright green color. You call a botanist for advice. She suggests that the plant may be deficient in magnesium (Mg++) . Why are these symptoms associated with Mg++ deficiency?

A) Cytochromes require Mg++ to function properly.
B) Mg++ is important in the structure of many amino acids.
C) Mg++ is required before NADPH can function.
D) Mg++ is an important component in chlorophyll.
E) Lack of Mg++ in the soil allows pathogenic bacteria to grow.