Question

which line from white fang best supports the inference that white fang was surprised by lip - lips hostility?
“ they half circled about each other, tentatively, snarling and bristling.”
“ the snap had taken effect on the shoulder that had been hurt by the lynx and that was still sore...”
“ lip - lip was white fangs own kind, and being only a puppy, did not seem dangerous...”
“ lip - lip had lived his life in camp and had fought many puppy fights... ”

Explanation:

The line "Lip - lip was White Fang's own kind, and being only a puppy, did not seem dangerous..." shows White Fang's initial perception that Lip - lip, being of the same kind and a puppy, was not a threat, thus indicating surprise at Lip - lip's hostility.

Answer:

C. "Lip - lip was White Fang's own kind, and being only a puppy, did not seem dangerous..."