Catastrophism and uniformitarianism differed in which way? A. Catastrophism argued for.a young Earth while uniformitarianism argued for an old Earth. B. Catastrophism emphasized rapid change while uniformitarianism argued for slow, gradual change being more important. A only B only Neither A nor B Both A and B

## Step 1<br />The question is asking us to identify the differences between two geological theories: catastrophism and uniformitarianism. <br /><br />## Step 2<br />Catastrophism is a theory that suggests that Earth's geology has been shaped by sudden, short-lived, violent events. This theory supports the idea of a young Earth, as these catastrophic events would have occurred relatively recently in geological terms.<br /><br />## Step 3<br />On the other hand, uniformitarianism is a theory that suggests that the Earth's geology has been shaped by slow, gradual processes. This theory supports the idea of an old Earth, as these processes would have taken billions of years to shape the Earth's geology.<br /><br />## Step 4<br />Therefore, both options A and B are correct. Option A correctly identifies that catastrophism argues for a young Earth, while uniformitarianism argues for an old Earth. Option B correctly identifies that catastrophism emphasizes rapid change, while uniformitarianism argues for slow, gradual change being more important.