When Mary tranquilized her cat for its regular teeth cleaning, Diane made an impression of the little pink tongue. She had to work around an oxygen tube in the cat's mouth. But, once again, she was able to produce an amazingly detailed impression. It included all the spines that made the cat's tongue so rough.

—Bone Detective: The Story of Forensic
Anthropologist Diane France,
Lorraine Jean Hopping

What is the author's viewpoint in this passage?

The author thinks that Diane could have been harmed by the cat.
The author feels that making the impression of the cat’s tongue was easy.
The author is impressed that Diane’s idea for making the impression worked.
The author believes that the cat was in danger while tranquilized.