Ruben Has a New Puppy Named Paddington and Wants to Feed

Ruben has a new puppy named Paddington and wants to feed him the best possible food.He decides on an experiment where he will feed Paddington the very best canned food plus a dietary supplement of vitamins recommended by a veterinarian.Which of the following best describes Ruben's project?

A) Ruben needs to take careful measurements of Paddington's weight and height at least once a week for it to be a good experiment.
B) This is an example of an excellent,controlled experiment as it is written.
C) Ruben needs to control for the amount of exercise,sunshine,water,and care that Paddington gets each week,so that they are equal from week to week.
D) Ruben needs to feed his mother's 6 -year -old chocolate Shar -Pei named SallyJo a standard diet so that he can compare Paddington to a control.
E) This is a poorly designed experiment,because there are no control dogs and no treatment replicates.