Which one of the following tools is used by RBI for selective credit control ?

• A. It advises banks to lend against certain commodities
• B. It advises banks to recall the loans for advances against certain commodities
• C. It advises banks to charge higher rate of interest for advance against certain commodities
• D. It discourages certain kinds of lending by assigning higher risk weights to loans it deems undesirable
• E. None of these