What do civilizations that thrive for long periods of time all have in common?
a. they increase trade with neighboring societies
b. they react to environmental problems
c. they expand constantly and absorb other civilizations
d. they make laws that limit their populations

wheres the following authors?

his tongue, i believe, was bloody and hanging out of his mouth.

he looked as if he were hungry.

he has several wolf-like qualities; a gray coat, sharp claws and yellow fangs.

those eyes made me feel, dear reader, like the end was near.

as i reached for a stick, he moved to the other side of the hill.

panting and hungry, he looked at me, a defenseless human and he snarled.

well i said my prayers, however, he simply turned and limped off.