Is It He Shall Crush Your Head? Or She Shall Crush Your Head,

If we look in our modern bibles at Genesis 3:15, Whether Catholic or Protestant,

  we read:

I will put enmity between you and the woman,

    and between your seed and her seed;

he shall bruise your head,[a]

    and you shall bruise his heel.”

However, if we look at the king James and other older Protestant bibles the passage reads:

15 And I will put enmity between thee and the woman, and between thy seed and her seed; it shall bruise thy head

Others say: “ they shall bruise your head”

And all Catholic bibles before the current era read:

 I will put enmities between thee and the woman, and thy seed and her seed: she shall crush thy head, 

So the question is “ who bruises the head of the serpent?

He, she, it, or they?

One might think it doesn't matter, That the Catholic church has given in on this point and admitted that it was wrong. That it is indeed “ He” who will crush the head of the serpent.

But I think this would be a mistake,  and that the correct interpretation of 3:15 is in fact