Which of the Following Research Findings Is Consistent with Folkbiology

Which of the following research findings is consistent with folkbiology theory?

A) Children recognize that there is a vital life force in food and water that gives people and other animals energy.
B) Children as young as 4 understand that plants and animals can grow and heal but inanimate objects cannot.
C) Even children living in cities are able to assign living things into simple taxonomic categories at a young age.
D) All of the above are consistent with folkbiology theory.