Choose the answer that demonstrates correct separation of the elements in a series. Walking to school, we saw a dog a raccoon and a squirrel and Ada my sister also saw a turtle. a. Walking to school, we saw a dog, a raccoon, and a squirrel, and Ada, my sister, also saw a turtle. b. Walking to school, we saw a dog; a raccoon; and a squirrel: and Ada, my sister, also saw a turtle. c. Walking to school, we saw a dog, a raccoon, and a squirrel; and Ada, my sister, also saw a turtle. d. Walking to school, we saw a dog: a raccoon: and a squirrel; and Ada, my sister, also saw a turtle.