What is the ultimate explanation for modern human preference for fatty foods?

Which of the following  bestillustrates a negative reinforcer?               a.  copland gives up candy to stave off chronic acid indigestion.    b.  nancy learns that she prefers chocolate over vanilla.    c.  carmine changes his major to english lit after failing a math exam.    d.  on a hot day, lindberg always drinks lemonade.

People who spend more money on binoculars tend to know more about birds than people who spend less or none. this observation was almost certainly based on what kind of study? a. double-blind study b. correlation c. anecdote d. single-blind study

Buddies is the main religion of india a. true b. false