Are invertebrates with soft bodies, bilateral symmetry, and three tissue layers organized into organs and organ systems

Worms are invertebrates with soft bodies, bilateral symmetry, and three tissue layers organized into organs and organ systems.
Invertebrates are animals who don't have a backbone.Worms are members of several invertebrate phyla, including Platyhelminthes. The most well-known worms are the earthworms. They live within the soil all over the world.

Ithink option a is correct because you cannot donate a different blood group than yours because it won't match.option a says betsy can donate to mark. they have the same blood group so donation can happen.