I think the answer would be d
These two researcher obligations, wherein the researchers make sure that the participants are told about the true nature of the study before they leave and they must make sure that the participants do not feel bad about their behavior, are referred to as debriefing and protection from harm.
<span>Many intellectuals and many of those working in development believe that the size of the world's population and its accelerated growth is the greatest problem and the gravest threat to humanity. Clearly, the ratio of the number of people to the amount of food available has an impact on nutrition, but how do these two factors interact? At the end of the eighteenth century the British political economist Thomas Malthus speculated that population growth could soon surpass production and food supply. By the end of the twentieth century, this had not happened, but malnutrition was widespread.</span>
