Visual acuity is entirely genetic and is unrelated to environment

Mohamed is home alone one evening when he thinks he hears a voice. He investigates and finds that there's no one there. This would be called a _______________ in the terminology of signal detection theory

FIll in the blank with correct word.

If you stare for 30 seconds at a red object and then look at a blank sheet of white paper, you will see a greenish image of the object. This phenomenon BEST supports the ______ theory of color vision

a. Helmholtz opponent-process c. Hering opponent-process b. Helmholtz trichromatic d. Hering trichromatic