A metal wire with cross-sectional area $A$ and original length $l$ is subjected to stress $\sigma$. It consequently has strain $\epsilon$. Which expression gives the Young modulus of the metal?
- A$\frac{\epsilon}{\sigma}$
- B$\frac{\epsilon A}{\sigma l}$
- C$\frac{\sigma}{\epsilon}$
- D$\frac{\sigma l}{\epsilon A}$