If a New Form of Plankton Were to Develop That

Multiple Choice

If a new form of plankton were to develop that converted CO₂ into oxygen as part of its natural metabolism,what would the likely effect be on global temperature?

A) Global temperature would not rise as fast, because by removing CO₂, the plankton would be removing greenhouse gasses.
B) Global temperature would rise faster because plankton-produced oxygen has a greenhouse effect.
C) Global temperature would not be affected, because both CO₂ and oxygen are greenhouse gasses.
D) Global temperature would decrease because the total content of CO₂ in the atmosphere and hydrosphere would decrease.