Joachim and Maricella Are Going for a Romantic Walk in the Park

Joachim and Maricella are going for a romantic walk in the park after an afternoon storm.Maricella looks up in the sky and sees a rainbow.She exclaims,"How beautiful!" Joachim,being something of a geek,might correctly say ___________

A) "You are just seeing the visible spectrum."
B) "That's because you are seeing all the wavelengths of light we can see from short to long."
C) "That's because different wavelengths lead to the perception of different colors."
D) All of these things would be true if Joachim said them.