C is not correct for two reasons:
- "Yes, it is special for me" simply doesn't make sense in context. It might be a cultural issue, but I can't imagine a situation where you would apply "it is special for me" to a generic object.
- "It is special for me" is not a grammatically correct construction in the first place. "...special to me" or "...especially for me" would work, but "special" is an adjective and cannot modify a prepositional phrase like "for me."