[A] All members of photolithotrophic autotrophs are also members of algae, but not all members of algae are members of photolithotrophic autotrophs
[B] All members of algae are also members of photolithotrophic autotrophs, but not all members of photolithotrophic autotrophs are members of algae
[C] All members of photolithotrophic autotrophs are members of algae, and all members of algae are members of photolithotrophic autotrophs
[D] No member of photolithotrophic autotrophs is a member of algae