The withdrawal of south vietnamese troops from the northern and central provinces caused the north vietnamese to abandon their offensive a general panic as thousands of soldiers and civilians crowded the roads to escape the vietminh to attack the south vietnamese at dien bien phu the united states to send in combat troops

The right answer is:

a general panic as thousands of soldiers and civilians crowded the roads to escape the Vietminh .

Explanation:

In the months and weeks before the fall of Saigon in April 1975, a huge exodus of civilians and military men could be seen in the roads of Southern Vietnam. Morale was low and this fact surely contributed to the final outcome, the victory of the Northern Vietnamese troops.

NOTE: Please note that the right term here should be Viet Cong and not Vietminh.

a historian researching the immigration policies of the early 1900s would expect a source written today,rather than in 1910 to :

( a ) be more interested in objective data and statistics.

false

explanation: