Step 1: Understand the cash reserve ratio (CRR) and money multiplier.
The cash reserve ratio (CRR) is the proportion of a bank's total deposits that must be kept in reserve with the central bank. The money multiplier is a factor that determines how much money supply will increase as a result of an initial deposit. It is inversely related to the CRR.
Step 2: Analyze the options.
- Option (A) is correct. The money multiplier is given by \( \frac{1}{\text{CRR}} \). A higher CRR means that banks must hold more reserves, reducing the amount of money they can lend out, and thus reducing the money multiplier.
- Option (B) is incorrect because a higher CRR reduces the money multiplier, not increases it.
- Option (C) is incorrect because if banks hold all deposits as reserves (i.e., CRR = 1), the money multiplier becomes 1, not larger.
- Option (D) is incorrect because the cash reserve ratio directly influences the money multiplier.
Final Answer:
\[
\boxed{\text{Higher the cash reserve ratio, smaller the money multiplier.}}
\]