poor or similar word choice. such as using the wrong they, they're, their is the most common typo
A comma splice or comma fault is the use of a comma to join two independent clauses.
For example: It is nearly half past five, we cannot reach town before dark.
The comma splice is sometimes used in literary writing to convey a particular mood of informality.
Another example: The sun is high, put on some sunblock.
When something happens that is completely opposite the audience expects.
I think it’s d for the answer