Final answer:
Missionary salespeople seek out new customers for their companies' products and sell to them personally. They are not retailers, work for customers, or called merchandisers or detailers.
Step-by-step explanation:
Missionary salespeople are individuals who seek out new customers for their companies' products and sell to them personally. They do not primarily work for retailers (option C) or work for customers trying to strengthen the consumer movement (option D).
These salespeople often go to different locations to promote and sell their products, similar to how missionaries travel to different places to spread their beliefs. They are sometimes called merchandisers or detailers (option E) because they pay attention to the details of their products and ensure they are displayed properly.