Discussion
Assertion (A): A soak at peak temperature often cures pinholing.
Reason (R): It gives the molten glaze time to flow over and close the openings left by escaping gas.
Answer: C
Both are true and the reason gives the mechanism: the fault is one of timing rather than of composition, so holding the glaze fluid a little longer allows the surface to smooth itself out. Too long a soak, however, may dissolve an opacifier.
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