1

False. We can create coupons for all products or a selected list of products. In current version, it is not possible to create coupons according to geo zones of customers.

2

True. We can offer the same item at different prices according to customer group. OpenCart even allows us creating a new customer group. A common application would be a VIP list which buys regularly at the store. We can give more discounts for this group.

3

False. It is also possible to offer discounts according to shopping cart item quantity. It is especially used for wholesale customers who buy at bulk quantities.