Once Grant was given command of all Union armies, he and his generals determined to end the war within a year, launching major offensive strategies that resulted in large casualty counts for both sides. They successfully took control of large areas of the South. This strategy is indicative of:
a) The Union's adoption of a defensive stance to prolong the war
b) Grant's reluctance to engage in offensive operations
c) A concerted effort to bring about a swift end to the conflict
d) Grant's preference for guerrilla warfare tactics