Air flows through a wet pipe at 298 K and 1 atm, and the diffusion coefficient of water vapor in air is 2.5 × 10^-5 m²/s. If the heat transfer coefficient is determined to be 35 W/m² · K, the mass transfer coefficient is
(a) 0.0326 m/s

(b) 0.0387 m/s

(c) 0.0517 m/s

(d) 0.0583 m/s

(e) 0.0707 m/s