he criminal dared not go out because he was afraid of _______.

A．they are so weak that it’s difficult for them to grow up
B． there are no black flowers in the world
C．the petals of black flowers are very delicate
D．they can take in the light of all wave lengths, which make the flowers dry up

A． many different kinds of colored light
B．three different kinds of colored light: red, orange and yellow
C．seven different kinds of colored light
D．four thousand kinds of colored light