Answer:
The best answer is actually letter A. Revising means improving the overall quality of a piece by changing parts of it, while editing means refining a piece by eliminating errors and improving clarity.
Step-by-step explanation:
Even though revising and editing convey similar ideas - to the point where they are used interchangeably -, they are different words carrying different meanings.
Editing is the process of correcting the text, changing anything that might be an obstacle to reading it. These changes include more straightforward aspects, such as spelling, grammar, sentence structure and punctuation, as well as more intricate aspects such as making complex concepts simpler, trimming excess words, replacing dense language with clear wording etc.
Revising, on the other hand, refers to looking at the text with a new perspective - revise basically means to look or to see again. Just like editing, it aims for clarity, but in a deeper sense. The changes made to the text will affect how readers perceive and relate to it, how they understand the ideas discussed. Some examples would be: adding more detail; eliminating unnecessary elements; adding new thoughts; reorganizing ideas etc. A revised text often looks much different than the initial one.
Taking the explanation above into consideration, I believe the best option to be letter A. Revising means improving the overall quality of a piece by changing parts of it, while editing means refining a piece by eliminating errors and improving clarity.