PLEASE HELP THANK YOU!!! How can the impacts of car use be reduced if the number of cars per person stays the same? Select all that apply.
A. Improving the bus and train system
B. Using carpools
C. Increasing the use of hybrid and electric cars, which produce less carbon dioxide
D. Finding new places to mine for the metals needed to make cars

I’m pretty sure it’s A. and B. but I don’t know if it’s C. or D. too. Thank you so much. Have a good day! (Also this is more of a science question but it didn’t fit any of the categories)