The receptor for smells are known as tastebuds which is answer D
An 18 month old baby and experiencing the world through senses is in Piaget's sensorimotor stage. The sensorimotor stage is the development of our senses such as, sense of sight, hearing, feeling, tasting and smelling. The sensorimotor stage is developed through 18 to 24 months of age.
The answer is C) Because nothing in this world is limited, especially not your nowledge base.