During the Reenactment of the Peary Arctic Expedition, a Dog

Multiple Choice

During the reenactment of the Peary Arctic expedition, a dog sled was loaded with 630 kg of supplies to carefully meet the needs of the entire trip. What is the consequence of adding 25 kg of extra supplies?

A) No consequence
B) It increases the efficiency of the pulling effort.
C) It decreases the energy required of the humans to navigate the sled.
D) It increases the energetic requirements of the dogs to pull the sled.