A pattern calls for three different fabrics.

To determine the order of the fabrics from least to greatest amount of yards needed, we first need to convert the measurements into a consistent format:

1. **Fabric A:** 3 7/8 yards
- Convert to an improper fraction: \(3 \times 8 + 7 = 24 + 7 = 31/8\) yards.

2. **Fabric B:** 3 1/5 yards
- Convert to an improper fraction: \(3 \times 5 + 1 = 15 + 1 = 16/5\) yards.

3. **Fabric C:** 9/3 yards
- This simplifies to 3 yards.

Now, let's compare the values:

- Fabric A: \(31/8 \approx 3.875\) yards
- Fabric B: \(16/5 = 3.2\) yards
- Fabric C: 3 yards

Now we can compare the decimals:
- Fabric C: 3.0 yards
- Fabric B: 3.2 yards
- Fabric A: 3.875 yards

From least to greatest:
- Fabric C (3 yards)
- Fabric B (3.2 yards)
- Fabric A (3.875 yards)

Thus, the correct order is **C, B, .

So the answer is **C, B, .