Question - Energy flows in Inuit society

Diagram:
This was a complicated flowchart diagram of quantified energy flows, with different members of society (men, women and children), different types of work (campwork, travelling, hunting, mining and carving, wage work), different commodities and energy products (selling skins to purchase gasoline, feeding excess fat from hunting to dogs). I believe this flowchart can be found in the book The Flow of Energy in a Hunting Society by William B Kemp, as published by Scientific American. I will attempt the creation of a modified diagram as a study aid.

Questions:

Which of the following is true?
A. Housing is a net provider of energy
B. Snowmobiles use less energy than they provide
C. Children have no effect on the Inuit energy system
D. Dogs use more energy than they provide

Which change would have the greatest effect on the Inuit lifestyle?
A. Price of gasoline increases by 2%
B. Dragnet hunting reduces the number of seals by 40%
C. The carving-stone mine closes down, reducing supplies of carving stone and mine work
D. Wages paid for wage work drop 10%

Of the following four Venn diagrams, which best describes the division of work in an Inuit camp?

(choose from four Venn diagrams for answer; they are not labelled so you need to choose which circle represents men, women, children)