Adam is writing a research paper about recycling, and he has several potential research questions. which is his best option? how many us cities have recycling programs? why didn’t people start recycling earlier in history? what are the effects of recycling on the environment? which materials are recyclable?

The correct answer is C. What are the effects of recycling on the environment?

Explanation:

A research paper is a type of academical formal paper to report the findings and process of researching which is guided by the main question. In terms of the research question, this should be an open question (yes/no questions are not appropriate), it should focus on the topic provided if any and the question should be broad which means the question should explore the topic deeply and multiple sources and concepts are needed to answer it. Considering this, the best question in this case is "What are the effects of recycling on the environment?" because this question addresses the general topic "recycling" but also it is a broad question as it is necessary to gather a lot of information to answer this question and it is the also the only one that would help Adam to understand the topic deeply.

answer: d

explanation:

given the fact that the question is about the detail that best support the idea that oppressive leaders use   propaganda to achieve thir goals,   the first option does not refer to any kind of propaganda, since it only tells about that the milk and the windfall apple should be reserved for the pigs. in the second option, that is, "snowball and napoleon sent out flights of pigeons whose instructions were to mingle with the animals on the neighbouring farms, tell them the story of the rebellion, and teach them the tune of "beasts of england". it can be identified that the oppressors make use of the propaganda, which is represented by the pigeons, and the information they have to tell other animals about what was happening in the farm in order to get their objectives. for that reason, the right answer is the second option, taking into account that the third option do not refer to propaganda since it only talks about that they did not want jones back. and, finally, the last option refers to the result of the given news, but it does not mean about the propaganda they used to achieve their goals.