Citizens in most countries have which civic duty? A. Applying for naturalized citizenship
B. Getting married to another citizen
O C. Attending school at certain ages
D. Serving in the country's government

i think its D serving in theand A applying for

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.