Answer:
c .When they reached the summit of Haleakala, it was almost dawn, they took pictures of the sun risingover the volcanic rim.
Explanation:
As you can see, the phrase shown in the question aciam, presents a sequence of activities that a group of individuals performed on the summit of Haleakala. These activities must be separated by commas, however, as it is a sequence of activities, it is not correct that the last comma is accompanied by the word "and", which means that option A is incorrect.
It is also not correct to use the adverb "then" after the pronoun "they", which indicates that option B is also incorrect and option C is correct.
Yes it is okay as long as you give credit to that person
start with a thesis statement on the topic. then put three topic sentences on that thesis in the first paragraph. your body paragraphs will be about each topic. then you final paraggraph restates the thesis and the topics.