At what age do more than half the toddlers engage in cooperative pretend play?

The current thinking regarding the biological theory of paraphilias suggests:

a) A strong genetic contribution. b) The disposition toward paraphilias resides in the limbic system. c) A minor role for hormonal dysregulation. d) Biological factors are associated with alcohol use, which leads to paraphilias.

Which of these is evidence favoring the opponent-process theory of color vision? a. After staring at a bright-colored image, we see a negative afterimage. b. From a distance, tiny blue dots appear to be black

c. It is possible to mix three colors to match any other color. d. We can still recognize all colors while wearing tinted glasses.