I think the answer is d. Not sure if wrong, sorry.
The line from which Helen grey implies that the author thinks physical beauty is not the most valuable quality would be “but so you miss that modest charm; which is the surest charm of them all” there’s no focus on any physical attribute but instead on the modesty of Helen grey
Answer:
If you (stay out) in the rain (too long) you get sick
Explanation: This just sounds better to me. I don't know if you need to figure out what words to emphasize but there's my answer
Singular noun is a noun that assigns to one thing, one person and one idea. Example: Boy, Girl, Father, Mother, Man, Doctor and so on.