To That or Not to That

Made at wigflip.comNo, wait, that is the problem.

When we had Depression Cookies professionally edited, our editor hated that and told us to get rid of it as much as possible (he felt the same way about just). So, I started noticing thats everywhere. They started annoying me.

Then, I had a lovely lady write a guest post for me last year who loved that. She asked me to please edit her piece. Her post was that-heavy, so I got rid of most of them. When I sent the piece back to her for review, she requested I put all the thats back in. She said her English Professor in her Masters program reprimanded her for taking out all the thats.

So, which is it?!

Example A: She is glad she kept her distance.
Example B: She is glad that she kept her distance.

I prefer A. Without the that, it seems stronger to me. But am I missing something?

Please share your that theories.