In the Parable of the Sower (Matthew 13:1-23), what does the seed that falls on the path represent?

A People who hear the word but do not understand it, and the evil one snatches it away. B People who hear the word and receive it with joy, but have no root and fall away when trouble comes. C People who hear the word, but the worries of this life and the deceitfulness of wealth choke it, making it unfruitful. D People who hear the word and understand it, and produce a crop, yielding a hundred, sixty or thirty times what was sown.