The correct answer is A. Evil
Step-by-step explanation
In the Don Quixote fragment, he refers to "Friston" a character he blames for having "who carried out my study and books" and "turned these giants into mills" to rob him of the glory of vanquishing them. Later, he expresses that their relationship is one of "enmity" because Frinton has acted against Don Quixote, according to above it can be inferred that the word enmity according to the context described refers to the evil act of Friston against Don Quixote, so the correct respect is A. Evil.