Tara Mark hasn't answered my queries. Why is that?
A check of the agency website might provide a big clue. She's not listed as part of the RLR team anymore. Could be that queries addressed to her are being tossed, or forwarded to her and she just isn't into the agenting business anymore.
Strike another agent off the list. But keep an eye open. There's bound to be someone new coming in to take her place. Someone who hasn't seen the query before, doesn't know the title and has never heard your name.
There's always another opportunity on the horizon.