When your LinkedIn connection request is ignored

What is your theory about why that happened?

A) That person never actually checks LinkedIn alerts. B) That person does not know who you are. C) That person hates your stinking guts. D) That person tried to approve the connection but there was some sort of technical glitch. E) That person looks really good in his or her photo and assumes you regard LinkedIn as a dating site. F) That person died and you never heard about it. G) Same reason he or she didn’t follow you back on Twitter. H) That person thinks he or she is too good for the likes of you. I) Your LinkedIn photo is off-putting. J) That person knows you want to ask for a favor. K) That person has you confused with a Spokane felon. L) Your smug LinkedIn profile triggers gag reflex in all who read it. M) Other.