Which statement about world war two is correct

A: The Japanese developed long-range rockets, called the V-2s, to launch against the United States

B: Stalin refuse to except aid from the United States because it was not a communis country

C: German submarines, called U-boats, snak many allied ships in the
Atlantic ocean

D: defend its territory in Asia and South America, Italy had to fight a two-ocean war

your answer is 2. correct me if I'm wrong

C: German submarines, called U-boats, sank many allied ships in the  Atlantic ocean is correct.

The Japanese did not develop long range rockets, the Germans did so A is incorrect. Stalin joined the allies so B is incorrect. Italy was not fighting in the ocean as far as i know. D is incorrect,

boundary is what it refers to hope this

explanation:

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.