In an SMB, suppose A (weakly adsorbed component) product purity is okay, but B product purity is too low. We can increase \(\mathrm{B}\) product purity while maintaining A product purity by

a. increasing recycle flow rate \(V_{1}\) and all other internal flow rates.

b. increasing recycle flow rate \(V_{1}\) and all other internal flow rates, then decreasing \(V_{1}\) moderately and increasing \(\mathrm{P}_{\mathrm{A}}\).

c. decreasing \(\mathrm{F}\).

d. decreasing the operating temperature.

e. decreasing particle diameter.

f. all of the above.