The Major Archaeological Problem with Waterlogged Finds,particularly Those Made Out

The major archaeological problem with waterlogged finds,particularly those made out of wood,is

A) that they are always too big to fit in museum laboratories
B) that currently we have no scientific methods to preserve them
C) that wood preserves in all conditions,making waterlogged wood redundant
D) that they deteriorate rapidly when they are removed from the water
E) all of the above