The riot at the Stonewall Inn that began the modern movement for equality for gay males and lesbians was sparked by what? 

A. A raid by police on a bar popular with gay men and lesbians
B. Refusal of the bar to serve gay and lesbian patrons
C. Anti-gay protestors who showed up at the bar
D. An attempt by a gay couple to hold a marriage ceremony at the bar
E. Refusal of the bar to hire openly gay workers

Answer: A