<span>A member of Congress who serves as a communications channel between the house's leadership and the rank-and-file members is known as The Speaker of the House. The current speaker of the House is John Boehner.</span>
Explanation: The Battle of Gettysburg was a turning point in the Civil War in that Lee's failure to take the war into the North showed the limitations of the Confederate cause and made it so that the war would be contained to and thus the damages would be felt exclusively in the South.
I believe the correct answer from the choices listed above is option D. Scientists <span> like Einstein, Bethe, Fermi, Teller, and Bloch emigrate in order to escape persecution and pursue scientific research in the UNITED STATES. Since they have more freedom in that country. Hope this answers the question.</span>