What is true of all modern economic systems? O They are all mixed economies.
O They are all market economies.
O They are all command economies.
O They are all traditional economies.

Explanation:

they are all mixed economies

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.

answer; the federal reserve system;