which best describes a major difference between latent functions and
manifest functions?
a. latent functions are unintended, while manifest functions are
intended.
b. latent functions are studied by biologists, while manifest
functions are studied by sociologists.
c. latent functions are to society, while manifest functions
are harmful to society.

d. latent functions occur in rural areas, while manifest functions
occur in urban areas.

A. Latent functions are unintended, while manifest functions are  intended.

Explanation:

-Latent functions are unconscious behaviors that tend to resulted in a certain situation in the long run.

Example:

When parents beat up their kid every time the kid did something that they don't like, the kid will most likely grow up to be someone that will beat up others in similar situations.

This effect tend to be unintended by the parents who aren't aware of the effect of their actions.

- Manifest functions is consciously enforced to create a certain behavior.

Example:

When the parents give some sort of reward every time the kid get good grades. This tend to make the kid become more likely to put an effort in studying.

When that happen, the parents get exactly what they expect. Because of this, we can say that the result is intended.

answer; if congress didn't act on certain requests;

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.