Which source would be the most credible to use in a research paper about the environment a a pamphlet published by the environmental activist group be a personal blog of a student learning about alternative fuels see a study published by the united nations environmental committee d or website of the coal producer

one thousand and one nights, also known as arabian nights is a collection of stories whose basic structure is that of embedded narrative. this technique refers to a main story which works as the common frame - or framing narrative - for the other stories, and then this series of stories which are connected to the main one. this technique can also be referred to as a story within a story. the stories stem from the original tale, some begin and end on their own, some are connected to the previous or following one, by means of questions that are answered in the subsequent tale, or characters which reappear.

b and d

explanation: