Why Is Coal Typically Found at Mid-Latitudes and Not Evenly

Multiple Choice

Why is coal typically found at mid-latitudes and not evenly distributed across the globe?

A) Coal formed preferentially in the mid-latitudes 250 million years ago.
B) Coal was formed in the tropical regions a long time ago and relocated to the mid-latitudes due to continental drift.
C) Coal turned to petroleum or natural gas in other parts of the world 250 million years ago.
D) Coal is distributed fairly uniformly but exploration has focused in the mid-latitudes.
E) The mid-latitudes had the ideal swampy conditions that initiated the long process of turning dead organisms into coal.