Despite the clear instructions, many students struggled with the assignment, a problem that could have been avoided if…

Despite the clear instructions, many students struggled with the assignment, a problem that could have been avoided if they had read more carefully.

1. A.Despite the clear instructions, many students struggled with the assignment, a problem that could have been avoided if they had read more carefully.
2. B.Despite the clear instructions, many students struggled with the assignment, this problem could have been avoided if they had read more carefully.
3. C.Despite the clear instructions, many students struggled with the assignment; a problem that could have been avoided if they had read more carefully.
4. D.Despite the clear instructions, many students struggling with the assignment, a problem that could have been avoided if they had read more carefully.