Excerpt from "The Adventure of Silver Blaze" by Arthur Conan Doyle

Which of the following is the best summary of the excerpt from "The Adventure of Silver Blaze"?

"You have a few sheep in the paddock," he said. "Who attends to them?"
"I do, sir."
"Have you noticed anything amiss with them of late?"
"Well, sir, not of much account; but three of them have gone lame, sir."
I could see that Holmes was extremely pleased, for he chuckled and rubbed his hands together.
"A long shot, Watson; a very long shot," said he, pinching my arm. "Gregory, let me recommend to your attention this singular epidemic among the sheep. Drive on, coachman!"

A. Holmes waives any concerns about the sheep, as they are not important to the case.
B. Holmes is displeased upon learning about the injured sheep, as it means he failed to solve the case.
C. Holmes is pleased upon learning of the injured sheep, which seems to support his hypothesis.