The main reasons for imposing a tariff are
a. tariff revenue and rent seeking
b. tariff revenue and protecting jobs
c. protecting jobs and protecting the environment
d. rent seeking and protecting jobs

Answer:

The main reasons for imposing a tariff are B tariff revenue and protecting jobs

Explanation:

Tariffs are essentially a tax payable on imports of goods to the custom authority of the consumer’s country so as to discourage excessive imports which may have a detrimental effect on the domestic economy.  

The first main reason for imposing of tariff is Tariff Revenue. This basically means that the Government gain a hefty amount as taxes on imports not only from the manufacturers but also the domestic importers and thus forms a part of its revenue which is spent on the country’s developmental plans.  

Secondly, tariffs are imposed for protecting jobs by preserving the domestic industry. This is especially the case when goods are imported from mass manufacturers in countries like China etc which pose a serious threat to small and medium scale industries in the Domestic market. By imposing tariff, these imported products are made more expensive, preventing losses to domestic producers and therefore protecting jobs.  

explanation:

allergens: overstimulate the nerve system

neurotics: attack nerve cells

mutagens: damage or otherwise alter dna sequence

generators: cause defects during growth and development  

carcinogens: cause unchecked cell growth

i hope you get the idea according to me these are the effects that happened.