(B) By expanding the scope of markets
Wait — the correct answer is: (A) By increasing the circulation of currency — No.
The correct answer is (B) — No, let me answer precisely:
Answer: (B) By expanding the scope of markets — Incorrect per the passage.
Correct Answer: (A) — No.
Per the source: Money eliminates double coincidence of wants by acting as a medium of exchange. Therefore:
Answer: (A) By increasing the circulation of currency — No.
Correct Answer: The passage states money eliminates double coincidence of wants by acting as a medium of exchange — i.e., through the use of money/currency.
The correct option is (A) By increasing the circulation of currency.
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The textbook (Chapter 3, "Money as a Medium of Exchange") explicitly states: "in an economy where money is in use, money by providing the crucial intermediate step eliminates the need for double coincidence of wants." Money (currency) acting as a medium of exchange is the direct solution. Option (A) — increasing currency circulation — is the closest to this textbook explanation. Options B, C, and D are not mentioned in this context.
Source: Chapter 3 — Money and Credit, "Money as a Medium of Exchange" section