The flag comment reasons as follows:
In How does comment voting and flagging work?, I noticed this rule:
"If a comment is flagged by enough users it will be auto-soft-deleted. There is no penalty for this. Flagged comments will be surfaced to moderators, so if you have a problem with a comment, flag it."
According to my experience, It seems that the rule of comments flag is not similar to questions and answers flag. Question will be auto-soft-deleted only when it flaged as offensive or spamming.
What will happen after I flag a comment as each reason?
Does the comment will be auto-soft-deleted no matter users choose any reasons?
Does Stack Overflow will inform moderator after user flag a comment no matter he/she choose any reasons?