One Major Reason Why Lakes and Marshes Are Common in Recently

One major reason why lakes and marshes are common in recently glaciated areas is that _____. ​

A) those areas have very humid climates
B) a huge amount of water was released by the melting of the ice
C) the glaciers carved dendritic stream systems
D) when ice disappeared, sea level dropped, leaving standing water on land
E) preexisting drainages were disrupted by glacial erosion and deposition