[Q]: How does the sentence end?

Angela is better at learning new things as opposed to Mary due to 

[A]: Mary being more stupid.


[Q]: How does the sentence end?

Cynthia was having serious regrets about a break-up and asked Christine for support because 

[A]: Christine had just been through one.


[Q]: How does the sentence end?

The clock on Jessica's phone was always a few minutes behind Elena's phone, as 

[A]:
Elena  tended to arrive at their work office fifteen minutes early on weekday mornings.