What Is the Earliest Evidence of Humans' Ability to Understand

What is the earliest evidence of humans' ability to understand basic mathematical ideas?

A) Newborns less than one week old can distinguish between cards with four and six black dots.
B) Newborns less than one week old can distinguish between cards with two and three black dots.
C) Infants two or three months old can match the number of objects they see to the number of sounds they hear.
D) Children do not recognize mathematical quantities when they see or hear them until they are about four years old.