Final answer:
The exact deadline for posting responses to the main forum topic for the first forum cannot be determined without consulting the Course Schedule. It's essential to follow this schedule closely, as different posts may have varying deadlines.
The correct answer is 4).
Step-by-step explanation:
The deadline for posting your response to the main forum topic for the first forum is not explicitly stated in the snippets provided. However, the instructions emphasize the importance of referring to the Course Schedule for specific due dates. As each post may have a different due date, it is crucial to review this schedule closely to avoid losing points for late submissions. For discussions, keep in mind the basic guidelines which require creating a new thread under the Discussion 1 topic and following the instructions for initial posts and replies to classmates.
Since the provided text does not give a definite answer, it is therefore impossible to determine the correct deadline without consulting the specific Course Schedule. Remember, adhering to deadlines is essential for full participation and to receive full points for your discussions.