A Down-And-In Option _______________

A down-and-in option _______________.

A) provides a payoff if the firm's stock price falls below some specified percentage of what it was at the beginning of the option term
B) provides a payoff if the firm's stock price falls below some specified dollar amount during the term of the option
C) expires worthless if the firm's stock price falls below some specified percentage of what it was at the beginning of the option term
D) expires worthless if the firm's stock price falls below some specified dollar amount during the term of the option