When Dealing with Someone Who Has Been Hinting at Suicide

When dealing with someone who has been hinting at suicide, which of the following is a good approach?

A) Approach the person with support and acceptance, realizing that he or she probably feels misunderstood.
B) Try to avoid day-by-day commitments from the person, such as meeting for lunch.
C) If the person's mood abruptly improves, back off so that he or she is not reminded of earlier suicidal talk.
D) Do not ask the person if he or she is considering suicide.