In "First Lady Michelle Obama's Remarks in Town Hall with Youth of Northern Ireland," how does Mrs. Obama convey her purpose of informing the audience of their potential?

A. Mrs. Obama stresses that she always held tight to values like honesty and hard work.

B. She expresses her belief that the audience will leave a long-lasting impact on the world.

C. Mrs. Obama describes how optimistic she feels about future uses of technology.

D. She explains that she and her husband always enjoy meeting with young people.