Answer:
It's the last answer again! <3
Step-by-step explanation:
A comma splice means an instance of using a comma to link two independent clauses (which should instead be linked by a colon, semicolon, or conjunction), as in, "He loves cooking, he's great at making curries."
Just as the last answer in your problem is,
"She wrote the book, people liked it."
So, that is the correct answer and now you know what a comma splice is!
P.S., The sentence should go like this,
"She wrote the book; people liked it."
~Kweenie~