When using a post emulsifiable penetrant process, it is important to drain as much excess penetrant as possible from the surface of a test piece which has been immersed in the penetrant because:

• A. Too much penetrant on the part surface may lead to more rapid penetration and over-sensitivity
• B. A thinner layer of penetrant is likely to have higher capillary action and, thus, be more sensitive to fine discontinuities
• C. A thinner layer of penetrant will result in less penetrant contamination in the emulsifier tank
• D. None of the above