Thermal fatigue damage is in the form of cracking that may occur anywhere in a metallic component where relative movement is constrained, particularly under repeated __________.

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Thermal fatigue damage is in the form of cracking that may occur anywhere in a metallic component where relative movement is constrained, particularly under repeated __________.
A . Cyclic stresses
B . Thermal cycling
C . Pressure variations
D . All of the above

Answer: B