This is a test of commonsense with single/multi-choices. Complete the next sentence:

How to train an adult dog
Get some treats that your dog likes.
Take small pieces so that you can give it one for each thing it does without worrying about your dog getting fat. Some dogs, especially labradors and beagles, are extremely food orientated, and so you can set aside a portion of their daily kibble into a treat pouch, and use this to reward them.

A). Always give treats as part of an exercise routine, as this will train them. Be sure to pay attention to your dog's body language to make sure they are satisfied with their food.;
B). You can even preheat your oven ahead of time and bake the treats. Have your dog bite or nibble on a treat once per feeding.;
C). If you feed your dog three small food treats daily, you will train them to associate your treats with being rewarded. Take your dog's food and fill it with treats.;
D). Choose an environment with few distractions, such as your backyard. You want the dog to listen to you, rather than watching other dogs having fun in the park.;
The answer is:
D).