The sentences with correct parallelism and consistency are as follows-
A taxpayer is waiting to receive a tax refund from the Internal Revenue Service, you notice at what time the mail carrier arrives.
The veterans exchanged stories, ate hamburgers, and made a list with everyone's names including their phone numbers.
If you get better grades, it would be easy to get into top schools.
In America, people possess guns and have self-defense skills.
Parallelism and consistency are used in sentences for easy understanding without any complexities.
To understand more about consistency here:
https://brainly.com/question/19129356
#SPJ4