Answer:
Baldwin talks of a "disease" which afflicts black Americans and can wreck race relations and creating a "rage in the blood" so he is using the "disease" as a metaphor for probably the rage that black Americans have for experiencing the inequalities of life in the US especially in the 1960's when the civil rights movement was so strong and segregation was so strongly practiced in the South still.
Explanation:
Personification- I'm not quite sure, but, "Is this a dagger which I see before me," appears to be personification. I could be wrong.
Apostrophe- None, that I know of.
Allusion- "I have thee not, and yet I see thee still."
Hyperbole- "The handle toward my hand? Come. let me clutch thee:--"
One example of figurative language in the excerpt from Grendel is hyperbole. Hyperbole is when a statement is exaggerated or not meant to be taken literally.
Cheap would change to cheaper and cola would possibly change to soda, not sure about this one!