How can this be accomplished?

Universal containers uses Salesforce to track job positions and applicants. Applicants can apply for multiple positions and positions will have multiple applicants. The company wants to ensure that if an applicant is deleted, all associations between the applicant and the position(s) that he or she has applied for are deleted.

How can this be accomplished?
A . Create a many Cto- many relationships using junction object with both positions and applicants as masters.
B . Create a custom object between applicants and positions with lookup fields on the junction to both the objects.
C . Create a lookup relationship between applicants and positions with applicants as the parent.
D . Create a master detail relationship between applicants and positions with applicants as the master.

Answer: D