Which type of air mass would you expect to become modified more quickly: an artic air mass moving over the gulf of mexico in winter or a maritime tropical air mass moving into the southeastern united states?

The correct answer to this open question is the following.

The type of air mass that you would expect to become modified more quickly is an arctic air mass moving over the Gulf of Mexico in winter.

The arctic air mass comes from Siberia and northern Canada. The dry air of Siberia crosses the North Pole and that is when it spread all over the Noth American territory. Arctic air is colder than Polar air. If you want to know the other air mass classifications, they are the following: highland, continental tropical, maritime tropical, maritime polar, and continental polar.