Which government decision would best be handled at the state level? a) establishing trade with foreign countries b) allocating funding to troops c) issuing drivers license d) printing new currency and metal coins

The Answer You're Looking For Is:

~C. Issuing Drivers License

~Because the states will never have anything to do with Currency, Troops or Trade with other countries. I hope this helps.  

interdependence is when all participating groups and individuals depend on each other. if you depend on one anothers goods, you end up trading in order to get the items you're looking for. (for ex: if i have food and you have water, we trade in order to depend on each other to live)