Which of the Following Is the Best Way to Provide

Which of the following is the best way to provide contextual information for a quote?

A) "This horse doesn't have the pedigree that most Kentucky Derby horses have, but he's got more heart than all the other horses in the race combined," said Herb Graines, referring to his horse, Blue Smoke, one of the top contenders in Saturday's race.
B) "This horse doesn't have the pedigree that most Kentucky Derby horses have, but (Blue Smoke has) got more heart than all the other horses in the race combined," said Herb Graines, who owns the horse, one of the top contenders in Saturday's race.
C) Herb Graines said, "This horse doesn't have the pedigree that most Kentucky Derby horses have, but he's got more heart than all the other horses in the race combined." Graines was referring to Blue Smoke, one of the top contenders in Saturday's race.
D) All of the options are equally good.