The highest load sustained during a uniaxial tensile testing experiment is $10,000$ lb$.$ The original cross$-$section has a diameter of $0\mathrm{.}505$ in$.$ You may assume the cross$-$section is round. The applied true strain at the ultimate tensile stress is true$\_$strain $($epsilon$)=0\mathrm{.}3.$

Question: What is the true stress at the onset of necking?

$33,333$ psi

$49,925$ psi

$67,568$ psi

None of the above

Please choose an answer from above $($alredy tried none of the above and it was not the correct answer$)$