PART B: A. "The lovely gaze where every eye doth dwell" line 2
Explanation: The phrase "unfair which fairly doth excel" refers to how the process that made a face so beautiful, will destroy it eventually since everything is momentary. This statement is supported by line 2: "The lovely gaze where every eye doth dwell", which means that everybody loves to look at this person because of their stunning good looks. Both lines together refer to the fact that beauty is ephemeral.
She is relying on the primary source. This is because, the writer is first hand information about the experience of the author. What made it a primary source is also coupled with the fact that, the writer is the one that experience it and the one that is wrote the book based on his experience.