Answer:
Please order my sandwich without any toppings, I am allergic to tomatoes and onions.
Explanation:
It would be best with a semi-colon but I don't see an answer choice for that.
So this one is the next best option.
Answer:
D. to show the sequence of reasons.
A author may use words such as "first, additionally, furthermore, finally" to show the sequence of reasons.
Let me know if this helps!