Using Resources and Reference Materials for Editing Answers

According to Strunk, what is the correct way to punctuate this compound sentence?“Tony cooked dinner and I made the salad, but Mike just ate.”“Tony cooked dinner, and I made the salad, but Mike just ate.” “Tony cooked dinner, and I made the salad but Mike just ate.”

According to Strunk, what is the correct way to place an adverbial clause in this sentence?“While she walked to school, the dog kept barking at Megumi.”“The dog, while she walked to school, kept barking at Megumi.”“The dog kept barking at Megumi while she walked to school.”