Final answer:
Barbara Bush's commencement speech was primarily concerned about the importance of literacy and education. She emphasized the power of reading and encouraged the graduates to use their education to make a positive impact in the world.
Step-by-step explanation:
Barbara Bush's commencement speech was primarily concerned about the importance of literacy and education. She emphasized the power of reading and how it can bring knowledge, understanding, and empathy to individuals and communities. She encouraged the graduates to use their education to make a positive impact in the world and to never stop learning.