Lichens are older than plants.Is it possible that lichens were an important component in aiding the colonization of land by plants?

A)Yes; lichens could have floated in oceans and accidentally been washed up on land.
B)Yes; lichens could have modified the rocks and soil in a similar way that they do today when they colonize areas disturbed by volcanic explosions and fires.
C)No, because fungus and algae colonized land at different times.
D)No, because the fungus component of lichens is not as old as algae.
E)More experiments need to be done before we are sure.