Which of the following best describes the meaning of the multiplicities next to the number 4 in the preceding diagram?

1-Each stock is bought/sold at least once.

2-Each stock is bought/sold only once.

3-Each stock is bought/sold a maximum of many times.

4-Each stock is bought/sold a minimum of many times.

5-Both "Each stock is bought/sold at least once" and "Each stock is bought/sold a maximum of many times" are correct.