How is warm front formation different from occluded front formation?

A. A warm air mass rises above a cold air mass during a warm front, but two cold air masses surround a warm air mass during an occluded front.

B. Two cold air masses surround a warm air mass during a warm front, but a cold air mass moves against a warm air mass during an occluded front.

C. A cold air mass moves faster than a warm air mass during a warm front formation, but a cold air mass is pushed upward during an occluded front.

D. A warm air mass and a cold air mass form a boundary during a warm front, but water condenses between two air masses during an occluded front.

A. A warm air mass rises above a cold air mass during a warm front, but two cold air masses surround a warm air mass during an occluded front.