Which of the following sentences correctly uses inversion in a conditional sentence, of...

✂️ a) Were she to apologize, I might consider forgiving her.

✂️ b) If he would have known, he would have acted differently.

✂️ c) Should he needs help, he will ask for it.

✂️ d) Had they been aware, they would not go to the event.

✂️ e) If it rains, we will stay indoors.

Responda: Which of the following sentences correctly uses inversion in a conditional sentence, often found in formal English?