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.