Yes, the wealthy do have an obligation to help the poor. However, the term “wealthy” needs to be defined as does the term “poor.” Our society has become one of haves and have-nots with a very small middle class. The wealthiest should help the most. The wealthy do have a responsibility to help the poor
I am thinking A because b and c don't really express period of two weeks. It comes down to a or d. When you just talk or write you will most likely use a.
