You will be given a trivia clue, and the category it belongs to. You should answer with the best answer that belongs in the category and is described by the clue. For simplicity, answers should be in all lower cased letters.

Category: A BUSINESS IS BORN 
Clue: The first drug-store in this chain began operating out of a Chicago hotel in 1901; in 2009 the 7,000th store opened
walgreens

Category: WHAT'S THE MARTYR WITH YOU? 
Clue: This man whose feast day is Dec. 26 was the 1st Christian martyr; his story is told in the Acts of the Apostles
saint stephen

Category: MADISON & PHYSIOLOGY 
Clue: After leaving the presidency Madison returned to his estate named this

montpelier