[Q]: How does the sentence end?

Elena was full of anxiety when talking with Cynthia, thanks to 

[A]: Elena having a tendency to panic when in public.


[Q]: How does the sentence end?

Abby forgot to put her towel in her gym bag so she used a washcloth to dab her sweat, because the 

[A]: towel was unavailable.


[Q]: How does the sentence end?

Erin wanted to take the dog on a walk, so Lindsey told her to use a leash; 

[A]:
Erin asked where it was.