The correct answer should be A. Whomever.
This is because this can be paraphrased as "the instructor has picked him" not "the instructor has picked he". Him corresponds to whomever while he corresponds to whoever.
For outdoor trials, these have been carried out by the Mosquito Research and Control Unit Cayman, the Gorgas Memorial Institute in Panama, the Institute for Medical Research in Malaysia, Moscamed and the University of São Paulo in Brazil. In each and everyone of the outdoor suppression trials the wild population of Aedes aegypti<span> in the areas has been decreased by over 90%.</span>
It would be past tense because when you say something occurred you are saying that it has already happened
Answer and Explanation:
I'll provide an answer against the statement "The fast-food industry can give valuable work experience to teenagers.”
The fast-food industry is not at all concerned with the value the experience of working in it will add to someone's life. As was stated in the text, they hire teenagers "because they are less expensive to hire than adults, but also because their youthful inexperience makes them easier to control." The experience those workers will acquire from that job is limited, probably even useless in other areas. A McDonald's employee does not learn how to cook - they can't leave McDonald's to suddenly work at a regular restaurant. They have machines beeping all around them, letting them know when the food is supposed to be ready.
