Final answer:
Frederick Douglass expressed skepticism toward William Lloyd Garrison because Garrison criticized Douglass's abolitionist efforts.
Step-by-step explanation:
Frederick Douglass expressed skepticism toward William Lloyd Garrison because Garrison criticized Douglass's abolitionist efforts. While Garrison was a prominent abolitionist himself, he had differing views and methods compared to Douglass. This led to a disagreement between them, as Garrison's criticism of Douglass's efforts created a sense of doubt and suspicion toward him.