The tips that one should follow when posting a review or complaint online are:
You are allowed to give criticisms but these would be better if they came with the positive things the company did as well.
You should also keep your comment free of profanity, polite, and straight to the point instead of lengthy so that your issue can be dealt with easily.
In conclusion, options A and C are correct.
Find out more on how to criticize at https://brainly.com/question/2947946.