Step 1: Understand the context of 'Mac Flecknoe'.
*Mac Flecknoe* is a satirical poem written by John Dryden in 1682. The poem is a mock epic that ridicules Thomas Shadwell, a contemporary poet. The title character, Flecknoe, is portrayed as a king of the dunces. Dryden uses humor and mockery to attack Shadwell's literary abilities.
Step 2: Analyze each option.
- (A) John Dryden: Correct. Dryden is the author of *Mac Flecknoe*.
- (B) Lord Byron: Incorrect. Byron was a Romantic poet, and his works are vastly different from Dryden's satirical style.
- (C) Alexander Pope: Incorrect. Pope is known for his satirical works, but he did not write *Mac Flecknoe*.
- (D) John Keats: Incorrect. Keats was a Romantic poet, and his works focus on beauty, nature, and idealism, not satire.
Step 3: Conclusion.
*Mac Flecknoe* is a work by John Dryden, and it is known for its sharp satirical humor.