Read the Following Vignette and Answer the Subsequent Questions to the Best

Multiple Choice

Read the following vignette and answer the subsequent questions to the best of your ability.
Doug's neighbor Jake approaches him and asks if he can borrow his lawn mower. Though he didn't know him all that well, he decides to loan him the mower anyway. Later on, finds himself loaning equipment to his neighbors' Janet and Lee too. The next day, he needed to borrow some other lawn equipment but his neighbors say that they are unable to loan him the equipment, without explanation, causing him to become a bit perturbed. However, he starts to feel much better at the community association meeting where they publicly honored him for his constant help in the neighborhood. The next order of business is choosing the new community association president.
-Which type of exchange or exchanges is/are occurring between neighbors in this story?

A) direct exchanges
B) indirect exchanges
C) incomplete exchanges
D) both a and b