Which best revise this sentence for clarity without changing it overall meaning marin algae, the ocean plants life that generate more oxygen than all of earth's plants and trees combined' produce up to 80 percent of earth oxygen a. marine algae the ocean plants life that generate more oxygen than all the plants and tree that participate in photosynthesis produce up to 80 percent of earth oxygen b. marine algae produce 80 percent of earth oxygen the ocean plants life that generate more oxygen than all of earth plants and tree combine c. marine algae produce up 80 percent of earth oxygen - more than all of earth plants and tree combine d. marine algae produce up 80 percent of earth oxygen