Paula chooses to study at night, in the library, with a friend from class. Her study plan reflects which of the journalists' questions that can help define study strategies?"

when, where, and who

Explanation:

Her study plan reflects the question of WHEN, this is evident when the statements say "Paula chooses to study at NIGHT. It also reflects the question of WHERE, when the statements mentioned LIBRARY, and also it reflects the question of WHO when the statements mentioned a FRIEND FROM CLASS.

Hence, in this case, the correct answer is " WHEN, WHERE, and WHO.

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.