Question

Which is one way that mechanical weathering influences chemical weathering
A. Plants secrete acids that create holes in iron-rich rocks, thereby exposing them to moisture in the air, which causes the rocks to rust.
B.The roots of plants fit into cracks of iron-rich rocks, exposing them to moisture in the air, which causes the rocks to rust.
C.Winds break away layers of rock, exposing them to water for ice wedging.
D. Acids in the rain create holes in the rock, which allows water to get inside for ice wedging.
(please help me on this test, please don't guess @ganeshie8