Based on the provided references, specifically the information regarding the principle of superposition in sedimentary rock layers, C is older than B. The principle of superposition states that in undisturbed sedimentary rock layers, the oldest layers are at the bottom, with progressively younger layers on top. Therefore, if C is below B, then C is older.
This principle is fundamental in geology for determining the relative ages of rock formations. The reference mentioning layers A, B, and C explicitly states that C is the oldest, followed by B and then A.
- Example: Imagine a stack of pancakes. The bottom pancake is the oldest, and the top pancake is the youngest. Similarly, in sedimentary rock layers, the lower layers are older than the upper layers.
The other references, while mentioning "older" in various contexts (elderly patients, older adults, etc.), do not provide information relevant to comparing the relative age of B and C. Therefore, they are not relevant to answering this question about geological layering.
