SOLUTION STEPS:
  1. Convert all to a common denominator or decimals for easy comparison.
  2. As decimals: 3 3/4 = 3.75, 33/8 = 4.125, 17/4 = 4.25, 4 = 4.0.
  3. Decreasing: 17/4 (4.25), 33/8 (4.125), 4, 3 3/4. Match option C.