Choose the correct parenthetical citation for the following sentence in a research paper.
according to dr. clayton stephens, the effects of global warming are increasingly significant.
a. (75).
b. (stephens 75).
c. (stephens, 75)
d. (75, stephens).

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. 

the mending wall was written by robert frost