What did some feel was a key problem with the fifteenth amendment?
it did not extend voting rights to women.
it only allowed freed slaves to vote.
it did not extend voting rights to those without property.
it only allowed those in certain states to vote.

B.  

It only allowed freed slaves to vote.

Explanation:

:)

b. they require a huge investment of time, dedication ,training, and patience almost from the day they are born.

explanation:

the sentence gives a clear evidence of how carefully the sar dogs are selected and also specify from what time this exercise begins."almost from the day they are are born." this sentence shows as that this exercise begins early.

if you need any clarification or more explanation pls do mention in the comment section.

      hope this and if it does pls mark as branliest answer thx

i would suggest wrtiing it urslef

k12 has plaigsurism checkers