During a below-the-knee amputation, the primary focus of the surgical technique is to preserve the ankle joint whenever possible. This allows for better functional outcomes and facilitates the use of a prosthetic device.
  
b. Removing all muscles from the affected limb: While some muscle tissue is removed during amputation, the goal is not to remove all muscles. Some muscles are retained to provide coverage over the bone stump and to facilitate prosthetic fitting.
c. Creating a cosmetic incision line: While cosmetic considerations may be taken into account, the primary focus of the surgical technique is not solely on creating a cosmetic incision line. The incision is made to ensure appropriate tissue healing and to prevent complications.
d. Resecting the tibia and fibula bones: In a below-the-knee amputation, the tibia and fibula bones are typically resected to the appropriate level to accommodate the prosthetic device, but the primary focus is on preserving the ankle joint when possible.