Which of the following is not a major factor that influences the strength of a rock?

1) c. age of rock
2)high temperature and high confining pressure
3) As heat and pressure increase, ductile deformation becomes more likely
4) Once the elastic limit of rock is surpassed, the rock may flow.
5) Erosional deformation is NOT a form of rock deformation.plz make me brainliest 

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