The answer you are looking for is credo
Answer:
shamsher is the shotest by in the class
I think the best answer is B. Revising means refining a piece by eliminating errors and improving clarity, while editing means improving the overall quality of a piece by changing parts of it.
Books that are surrounded by oxygen will turn yellow, so basically, all books since oxygen is constantly surrounding us. Oxygen-rich conditions are very bad for paper, which gives them the yellow tiny. This is actually called lignin oxidation! Lignin oxidation gives it a yellow or brown colour as you said. Yellow comes first, then brown after.
I hope this helped a bit! :)