IN LINES 13-17, WHY DOES THE AUTHOR COMPARE TREE ROOTS WITH GROWIN...

74. In lines 13-17, why does the author compare tree roots with growing salt crystals? A. They both force hard surfaces to crack.B. They both grow as long as water is available.C. They both react quickly to a rise in temperature.D. They both cause salty water to rise from the groundwater table.