The answer is C. Appear is a verb and singular verbs normally end in -s. Also the sentence is talking about the conductor, not the pictures.
1. Verb : found .....helping :can be
2.Verb :authenticated ......helping:idk
4Verb.:scampered helping : across
5. devising, constantly
6.purchased, could
7. served, after-before
8. seek, must
9.do, after
10. have, been
11. seeing
12. soaping , before
Dumbfounded means to be left utterly speechless, or to simply be amazed/confused.
The answer is: The first-edition tales influenced folklorists to trust one another to gather authentic tales of living conditions.
