The plankot population would increase.
After the special pair gives up its electron, it has a positive charge and needs a new electron. This electron is provided through the splitting of water molecules, a process carried out by a portion of PSII called the manganese center^9 . The positively charged P680 can pull electrons off of water (which doesn't give them up easily) because it's extremely "electron-hungry."
Organisms that produce their own energy or "food" are known as autotrophs.
I believe the answers to this is C and D.
