A unit needs to select 20 blood donors out of 100 applicants for medical examinations. The people most likely to be selected are those who have donated blood since 1993, or those who have failed the blood donation medical examination since 1995. If the above determination is true, which of the following applicants is most likely to be selected? ? ['Xiao Zhang donated blood in 1995. His blood type is O type, which has the highest medical value.', 'Xiao Wang is a district blood donation pacesetter. In recent years, she has donated blood every year. This time, she resolutely requested blood donation.', 'Xiao Liu enrolled for blood donation in 1996. Because of the unsuccessful positive test of "Australian Antibodies", this time he issued a certificate of "Australian Antibodies" turning negative, and resolutely requested blood donation.', "Da Chen's last blood donation was in 1992. He was amputated due to a public injury, and the blood of volunteer blood donors was flowing in the blood vessels. He said, I have more reasons to donate blood than anyone."]