What led to the construction of the berlin wall 3.14?

The Berlin Wall was constructed to nip in the bud any attempts by refugees to leave East Berlin. Multitudes of East Germans envisaged fleeing from East Germany to the Democratic West Germany through Berlin.To avert this manifestly undesirable practice, the Communist East German government erected the Berlin wall.

i believe the answer is d.

during the 20th century, the role of the vice president has evolved into more of an executive branch position. now, the vice president is usually seen as an integral part of a president's administration and presides over the senate only on ceremonial occasions or when a tie-breaking vote may be needed.