What Can We Learn from the Anthropologist Richard Scaglion's Failed

What can we learn from the anthropologist Richard Scaglion's failed attempt to explain Newton's law of gravity to his Abelam friends in Papua New Guinea?

A) In trying to explain the concept, we need a textbook.
B) His audience had no science background and hence could not understand the concept.
C) We might not actually understand much of what we take as scientific fact in our society.
D) Newton's law did not apply in this context.