Identify the dependent clause in the following sentence and determine if it is an adjective (ADJ) or adverb (ADV) clause.
Leonardo da Vinci was the artist who painted the Mona Lisa.
0. Leonardo da Vinci was the artist--ADJ clause
0. Leonardo da Vinci was the artist--ADV clause
who painted the Mona Lisa.--ADJ
O who painted the Mona Lisa.--ADV

Refute it, showing why it is mistaken—an apparent but not real problem; acknowledge its validity or plausibility, but suggest why on balance it's relatively less important or less likely than what you propose, and thus doesn't overturn it; concede its force and complicate your idea accordingly—restate your thesis in a more exact, qualified, or nuanced way that takes account of the objection, or start a new section in which you consider your topic in light of it. this will work if the counterargument concerns only an aspect of your argument; if it undermines your whole case, you need a new thesis.