The tone of "The R*** of the Lock" can best be described as humorous. Option A is correct. In fact, he is making fun of people for making a big deal out of a small incident.
The R*** of the Lock is a mock-heroic narrative poem written by Alexander Pope. The poem satirises a small incident by comparing it to the epic world of the gods.
The R*** of the Lock was first published anonymously in Lintot's Miscellaneous Poems and Translations.