Identify the series of geologic processes that can transform 1. sediment into shale,

2. shale into slate, and

3. slate into magma.

a

1-cooling; 2-melting; 3-heat and pressure

b

1-compacting and cementing; 2-heat and pressure; 3-melting

c

1-melting; 2-heat and pressure; 3-cooling

d

1-weathering and erosion; 2-compacting and cementing; 3-cooling