The answer is D they were removed from the polis for 10 years
I think that the best answer to this is foreign investment: it was the one aspect which has helped Bulgarian economy the most.
The foreign investment is mostly connected to tourism - especially for example when rich western Europeans buy property in Bulgaria for private use.
The US would impose a retaliatory tariff against another country if they were to attack US shipping during a time of war where the US was a neutral party or if the said country did something major violating a common right or disrespectful to the US as a whole and we would use the tariff to try to force them to fix the issue.
Young adulthood is a time when a person is in their twenties and often attends college or is in another kind of education. During this time a person has to invest in the their future, while learning how to be financially independent, but the person does not yet other problems, such as ailing health.
So the correct answer is:
b. developing financial freedom.
