Answers, short and sweet:

A. For the horse check to see the last time it won, or the best class at which the horse has won or at the very least has been competitive in. Tracks (Provincial or Country) and prize money are all indicators.

B. The race itself, will generally be expressed at the top of the formguide, beside the name of the race.

C. The last race, again a half decent form guide will contain this information.

__________________
I like Bing Lee.