Answer:
supplier dependence (B)
Step-by-step explanation:
Here , Muffton has constraint in sourcing for one of its major materials-blueberries which is currently being purchased from only one source.
If the only supplier of blueberries decides not to sell to Muffton, then it will be out of operation.
This implies that supplier has upper hand over Mufflon and can do anything without being questioned.