A proposed drag-force law for a sphere moving through a fluid is \[ F = C\,\rho^{a}\,\mu^{b}\,v^{c}\,R^{d}, \] where \(F\) is force, \(\rho\) is fluid density, \(\mu\) is dynamic viscosity, \(v\) is speed, \(R\) is sphere radius, and \(C\) is dimensionless. If the law is meant to reduce to a Stokes-like regime where the force is linear in speed \(v\) and depends on viscosity \(\mu\) but not on density \(\rho\), which set of exponents is consistent with dimensional analysis?