first-line managers are typically those who

a. are typically involved with producing the organization's products or providing its service
b. are the first persons new hires meet
c. are at the top of the organizational chart
d. perform the same work as the people they manage but earn more money

A. are typically involved with producing the organization's products or providing its service

Explanation:

First-line managers are those who are directly above non-managerial workers. They are at the bottom of the managerial chain, but they are very important in a company.

A typical first-line management position is that of supervisor. The supervisor can oversee a production-line and check for quality standards, or can be the supervisor in a service-oriented firm, and check for possible improvements in customer service.