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Which outcome results when ancient Chinese cast iron plows encountered significantly varying soil densities?

A)Increased plow tip crack propagation
B)Enhanced soil nutrient distribution
C)Reduced soil microorganism activity
D)Superior seed germination uniformity

💡 Explanation

Increased propagation occurs because cyclic loading on brittle materials initiates the crack tip propagation mechanism. Therefore, this increases plow failure risk rather than benefits such as nutrient distribution and superior germination, that are unrelated to structural integrity.

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