The passage from Julius Caesar that uses personification is "He comes upon a wish. Fortune is merry, And in this mood will give us anything." Here option C is correct.
In this passage, Fortune is personified by being described as "merry" and capable of granting wishes.
Personification is a literary device where human qualities are attributed to non-human entities, and in this case, Fortune is portrayed as if it has emotions and the ability to be in a certain mood ("merry") and to fulfill desires ("give us anything").
This personification adds a vivid and imaginative element to the language, helping to convey a sense of unpredictability and capriciousness associated with Fortune or luck. Here option C is correct.