Final answer:
McCarthy is using personification in the given quote, attributing human-like qualities to the abstract concept of war.
Step-by-step explanation:
In the quote “Today we can almost physically hear the mutterings and rumblings of an invigorated god of war,” McCarthy is using personification. This type of figurative language attributes human-like qualities to non-human entities or abstract concepts. In this case, the “god of war” is given the human ability to mutter and rumble, suggesting heightened activity or presence despite war being an abstract concept. Consequently, the answer to the question is d) personification.