Lichens Play a Special Role in Chemical Weathering by

Lichens play a special role in chemical weathering by

A) weakening the hydrogen bond in water, making it more effective at dissolving rocks with high quartz concentrations.
B) slowing the rate of jointing in rocks.
C) acting as a catalyst for dissolution of minerals that crystallize at the highest temperatures.
D) secreting oxalic acid, which dissolves carbonates particularly well.