A. Public transportation is inexpensive and more comfortable than private transportation.
Ask for more sustainable power sources, more food packaged in less plastic, more nutritious meals for the school.
Answer: C. suggesting that the appearance of the ghost predicts problems to come
Explanation:
Horatio´s words to Marcellus reflect his fear that the ghost might be an omen of something bad happening in the future.
Bernardo and Marcellus urge Horatio to stay with them so he can see the ghost of Hamlet himself. After Horatio sees the ghost, he claims that, despite not understanding what´s happening, he believes that the ghostly presence can only mean something bad is going to happen.
The answer is all of the above
The author includes all of those answers through their writing
I answered this question, please refer to your other question :)