Answer:
I would say A is the correct answer
The electromagnetic radiation will be high because of the heavy internet usage and might lead to health problems such as a brain tumor and Skin Cancer. The HEV light emitted from the screen of a smartphone leads to severe eye-strain during long-time use and would slowly damage the retina.
A. Uses the vocab word incorrectly. ‘Exploit’ means to take advantage of which does not make sense in the context of the sentence (the correct word for that sentence is probably ‘explosion’).
B. Is correct because ‘esteem’ means to hold respect for.