Zachary: The term "fresco" refers to paint that has been applied to wet plaster. Once dried, a fresco indelibly preserves the paint that a painter has applied in this way. Unfortunately, additions known to have been made by later painters have obscured the original fresco work done by Michelangelo in the Sistine to have, everything except the original fresco work must be stripped away.
Stephen: But it was extremely common for painters of Michelangelo's era to add painted details to their own the frescos had dried.
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Break the argument into its conclusion and evidence, then do exactly what the question stem asks with that structure.
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Answers that sound relevant to the topic but don't connect to the argument's actual reasoning.
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Predict what a right answer must do, then test each choice against the conclusion-evidence gap.
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