His heart grew weary at the thought . It was a new reaction to a painful memory . Vader wondered if this was how Obi - Wan had felt when they fought on Mustafar . Anakin promptly buried the thought as he took control of the battle ; he did n't really want to know .
Who might Obi - Wan be to him ?
Pick the best answer from the following options:
A. Foe
B. None of the above choices .
C. Subordinate
D. Stranger


A