The line from the excerpt that best supports the idea that Ryan is an animal-lover is D. He definitely would be back to visit the tamarins as soon as he could.
This refers to the use of evidence to validate a claim by the use of either factual or statistical evidence.
Hence, we can see that based on the given text, there is the narration of the encounter of Ryan with a group of animals, tamarins, and how he took them to a vet and promised to come back to visit the tamarins as soon as he could.
Therefore, we can make the following conclusions:
With this in mind, the line from the excerpt that best supports the idea that Ryan is an animal-lover is D. He definitely would be back to visit the tamarins as soon as he could.
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