How did the european union’s new common market change life for workers?
a.) workers could move freely between nations.
b.) many workers unionized and demanded benefits.
c.) most workers earned more competitive wages.
d.) workers could share jobs and work fewer hours.

The European Union is a politico-economic union of 28 member states that are located primarily in Europe. It has an area of 4,324,782 km², and an estimated population of over 510 million. 

The correct answer between all the choices given is the first choice or letter A. I am hoping that this answer has satisfied your query and it will be able to help you in your endeavor, and if you would like, feel free to ask another question.

The first alternative is correct (A).

The European Union consists of an economic bloc aimed at integrating European economies. The countries adopted the same currency and a common Central Bank. In this sense, citizens of the bloc were able to move freely among member countries, including in relation to jobs. The bureaucracy for a citizen of one country block to work in another block country has decreased.

name two ways organisms join a population and two ways organisms leave a population. two ways organisms join a population are birth rate and immigration. two ways they leave are death rate and emigration.

explanation:

in mcculloch v. maryland (1819) the supreme court ruled that congress had implied powers under the necessary and proper clause of article i, section 8 of the constitution to create the second bank of the united states and that the state of maryland lacked the power to tax the bank.

gibbons v. ogden, (1824), was a landmark decision in which the supreme court of the united states held that the power to regulate interstate commerce, granted to congress by the commerce clause of the united states constitution, encompassed the power to regulate navigation.