Final answer:
Young's modulus can be used to calculate the strain for a stress that is well below the yield strength, well above the yield strength but below the ultimate strength, or including below and above the yield strength.
Step-by-step explanation:
Young's modulus can be used to calculate the strain for a stress that is well below the yield strength, well above the yield strength but below the ultimate strength, or including below and above the yield strength. So, options a), b), and d) are correct. Young's modulus is a measure of the stiffness or rigidity of a material and it represents the proportionality constant between stress and strain in the linear limit. When stress is low, the deformation caused by it is in direct proportion to the stress value.