Which of the following sentences contains a correctly used conjunction?

✂️ a) She went to the store but she didn't buy anything.

✂️ b) He studied hard, therefore he failed the exam.

✂️ c) They arrived early so they missed the event.

✂️ d) She neither likes tea or coffee.

✂️ e) He went to the party because he wasn’t feeling well.

Responda: Which of the following sentences contains a correctly used conjunction?