Who Wants to Be a Millionaire?

Contestants, selected by calling a phone number, are chosen based on their ability to arrange 4 answers to a question in the correct order the fastest. They then have to answer 15 multiple-choice questions correctly to win increasing amounts of money, the largest of which is $1,000,000. They can choose to use three "lifelines": 50/50: two incorrect answers are eliminated; Ask the audience: the studio audience votes on the correct answer; and phone a friend: they can call one of 5 pre-arranged friends who can help with the answer.