Search and Rescue Dogs Read the following article:

If a dog is selected for Search and Rescue training, it will be taught—through a series of games—how to make the most of its powerful nose. For example, dogs learning to follow scents on the air might play a tug-of-war game with the trainer involving a special toy. Then with a helper restraining the dog, the trainer will run away with the toy, find a hiding spot, and then call the dog. The dog can follow the scent of both the trainer and the toy. In this way, the dog is practicing important skills even though it may seem like just a game. Eventually, the toy is removed from this game, and the dog focuses on the human scent. Later the dog will learn more difficult tasks: to pick up a scent from an article of clothing or pick out a particular human scent in a crowd of people, for example.

Step-by-step, focusing on play-based learning, the dog acquires the techniques needed to find victims. Once the dog learns to find the human without the toy, the trainer will continue working with the dog, hiding the "victim" in more challenging spots, making the trail double back on itself, leaving a trail over a wide range of terrains, or adding another person as a distraction. Trainers also work with dogs in a variety of conditions; rain, snow, and high winds all affect the scent trail. Dogs have to learn how to overcome these conditions to find the scent trail and make the rescue. Trainers spend many hours exposing their SAR dogs to a wide range of situations, terrains, and conditions to make them effective regardless of the rescue situation.

When you see a SAR dog working at a disaster, trying to locate victims, remember the dog's natural talents have been carefully shaped by an equally talented trainer and handler. The dog, while amazing and probably beautiful, is just one half of a very important partnership.

Which line from the text best represents the author's opinion or point of view?

Dogs must practice important skills even though it may seem like just a game.
Dogs have to learn how to overcome these conditions to find the scent trail and make the rescue.
Trainers spend many hours exposing their SAR dogs to a wide range of situations, terrains, and conditions.
The dog, while amazing and probably beautiful, is just one half of a very important partnership.