Regarding Anna's rudeness, the man states, _____ can I.

The man is likely expressing his feelings about Anna's rudeness in a way that emphasizes his own inability or unwillingness to reciprocate her behavior. The phrase "Neither can I" suggests a shared alignment against rudeness; it indicates that he does not approve of the rudeness exhibited and is emphasizing that he cannot partake in such behavior himself.

This structure effectively conveys a sentiment of mutual understanding or agreement regarding the unacceptable nature of rudeness. By stating "neither," he affirms that he does not possess the ability or desire to act rudely, paralleling Anna's behavior. This phrase also highlights a contrast to her rudeness, reinforcing his position against it. Thus, it correctly captures the sentiment of the situation being discussed, making it the suitable choice in this context.