Carmen's Detective Agency Can Use Apprentice Detectives,A,or Experienced Detectives,E

Multiple Choice

Carmen's Detective Agency can use apprentice detectives,A,or experienced detectives,E.The cost of completing a job is C = 100 + A² + E² - 2AE.If a job requires a total of six detectives of either or both types,the cost-minimizing combination of detectives is:

A) A = 3 and E = 3.
B) A = 2 and E = 4.
C) A = 4 and E = 2.
D) A = 6 and E = 0.
E) A = 0 and E = 6.