Read the following sentence and decide whether the underlined portion contains a mistake. If so, identify the best way to correct or improve the sentence by choosing the appropriate suggestion from the answer choices. If the underlined portion requires no correction or improvement, choose No improvement or correction is required.
I got a severe headache because the jackhammer was running all day right outside my office window.
get a severe headache because the jackhammer was running
got a severe headache because the jackhammer were running
got a severe headache because the jackhammer will be running
got a severe headache, the jackhammer was running
No improvement or correction is required.