Despite the Advantages, Some Firms Are Reluctant to Use Third

Despite the advantages, some firms are reluctant to use third party logistics firms because:

A) of the diminished direct contact with customers.
B) they lose direct control of the logistics process.
C) of the problems associated with terminating internal operations.
D) all of the answer choices.
E) both they lose direct control of the logistics process and of the problems associated with terminating internal operations.