In __________ tolerance, tolerance to one drug may extend to other closely related drugs

LaToya's favorite time of year is Halloween, because she knows that she can go to every house in her neighborhood and get a treat. What reinforcement schedules play a role in LaToya's experience?

a. fixed ratio; fixed time b. variable duration; fixed time c. variable time; variable duration d. fixed interval; variable ratio

One of these things is not like the others. Can you figure out which one?

a. homosexual b. winkte c. gender identity disorder d. kathoey