Several european nations formed the european community in 1957 to

a.
create a common european currency

b.
create elements of government, including legislative, executive, and judicial branches

c.
allow for the movement of goods, services, and people across borders and to eliminate tariffs among member nations

d.
cooperatively manage heavy industry and to protect against the creation of weapons of war

option C , Different European nations are come together in 1957 to allow products, services and people to travel across borders and remove tariffs between Member States.

Explanation:

Different European nations are come together in 1957 to allow products, services and people to travel across borders and remove tariffs between Member States.

The 1960s is a good time for the market, aided by fact that when european countries tradeamong each other, EU nations stop charging duty. They even decide on shared command over agricultural production, so everyone had enough to eat  and hopefully there will be even more agricultural produce

the first plants to make the transition

explanation:

the awnser is a

it is not b or c