After Graduating from College, Michael Decided to Work for Mercy

After graduating from College, Michael decided to work for Mercy Care, a social venture established in Ghana. Michael is not paid for his services to Mercy Care. All he wants is to provide his time 'freely' to benefit kids in the Volta region of Ghana so that they may be able to go to school. Which of the following professional statuses characterizes Michael?

A) Paid employee.
B) Volunteer.
C) Consultant.
D) Board member.