Outbreaks of cold, dry air in the eastern United States during the winter are typically associated with what type of air mass?

Which of the following contributed most to making the items listed in the box

Consultant: you're welcome. as a first step, our team analyzed the other potential primary contenders. the reality is that with such a strong field, it is going to be difficult to gain the of votes necessary to avoid a runoff—unless you want to go negative from the start. and our opposition research team found plenty of ammunition to do just that.

When and why were fingerprints first used in the united states