Which of the following is an example of a mission statement?

A mission statement articulates an organization's purpose, values, and goals in a way that communicates its fundamental reason for being and what it aims to accomplish. The correct choice clearly defines the organization's intent and the specific impact it aims to have on its stakeholders—in this case, children and youth.

By stating that Big Brothers/Big Sisters strives "to make a positive difference in the lives of children and youth," this example reflects the organization's dedication to its mission of mentorship and support, establishing both a social purpose and a target audience.

The other options, while they may express intentions or values in a general sense, lack the specificity and clarity necessary to serve as effective mission statements. For example, being "the best in the industry" or having a "commitment to community enhancement" are vague and do not provide concrete information about what actions the organization will take or the impact it hopes to achieve. Similarly, "always providing quality service" conveys a dedication to service but does not specify what kind of service or to whom, making it less effective as a mission statement.