The Fact That the Ability to Perceive Blue Develops Later

The fact that the ability to perceive blue develops later than the ability to perceive red and green seems to be due to the fact that

A) the blue cone system develops later than the red and green cone systems.
B) the red and green cone systems develop later than the blue cone system.
C) infants lack the contrast sensitivity required to perceive subtle colours like blue.
D) infants lack the pattern sensitivity required to perceive subtle colours like blue.