Which revision best reduces the wordiness in this sentence without changing its overall meaning? marine algae, the ocean plant life that generate more oxygen than all of earth's plants and trees combined, produce up to 80 percent of earth's oxygen. a. marine algae, the ocean plant life that generate more oxygen than all the plants and trees that participate in photosynthesis, produce up to 80 percent of earth's oxygen. b. marine algae produce up to 80 percent of earth's oxygen. c. marine algae produce up to 80 percent of earth's oxygen — more than all of earth's plants and trees combined. d. marine algae produce 80 percent of earth's oxygen, the ocean plant life that generates more oxygen than all of earth's plants and trees combined.