Answer:
A. It has a comma splice and needs a conjunction.
Explanation:
Sure I’ll fill in any blanks, but you didn’t show any pictures or a text?
Games can help entertain people and keep people engaged more and due to this I feel like it could be benefit people wanting to learn more and remember stuff quicker.
If you're limiting the question to C or D, I would choose D.
In C, "her" is used as part of the subject, not an object.