What causes polar jet streams to form?

Question

A. High-pressure systems
B. Rapid changes in wind direction
C. Air masses moving away from each other
D. Warm and cold air masses

!@#$%&*(}"><.<|Z>:[=_{P;'|"?>.,!@#$%*&(* · Accepted Answer

soooo whats the answer

PsyDAG · Answer

From Internet: Undercutting sub-tropical air masses by polar air masses leads to the formation of polar jet streams. 2 This leads to surface low pressure and altitude high pressure.

chia <3 · Answer

It's D. Warm and cold air masses