1point
why did the united states military get involved in vietnam?
a. to force a democratic national election in south vietnam
b. vietnam's involvement in john f. kennedy's assassination
o
c. to american military advisors finish their assignments
d. fear that communism would take over southeast asia
e previous

The right answer is D.

Explanation:

We must remember the historical world context. There was a contest over global influence between the United States and the Soviet Union. America went to war in Korea in 1950 because it wanted to oppose what it perceived as a deliberate move of Communist expansion in Asia. In principle, it got involved in Vietnam for the same reason: to stop Communist advance in Asia, causing other countries to fall in the hands of Moscow-backed Communists (this is what we call the "domino theory").

the underground railroad (apocope of the metropolitan railroad) is a system of urban trains located within a city and its metropolitan area. it is characterized for being a massive transport of passengers in the big cities, uniting diverse zones and their environs, with high capacity and frequency and in segregated form to other systems of transport. metropolitan railroads are built underground or on the surface, although most systems use mixed models where sections are combined in both modalities.

1 - as a result, the metro tends to reduce car travel for two reasons: first, due to the greater transfer of users from the car and, second, due to the reduction in the acquisition of cars in homes located in sectors near the stations of the metro.

2 -the metro allows to contribute effectively to the achievement of all the objectives of an urban development policy: it improves the efficiency of the city's economy by reducing travel costs and also generates a higher level of activities in the city center, taking advantage of of the agglomeration economies.

3 -it is a clean means of transport, since it uses renewable energy (usually electricity), taking care of the environment and avoiding excessive pollution.