Correct answer: A. By making communication trade army movement and revenue control more effective
Explanation: The direct answer is A: these reforms made communication, trade, army movement, and revenue control more effective. Sher Shah Suri developed roads and sarais, or rest houses, which helped travellers, merchants, officials, and soldiers move more safely and quickly. Currency reform made payments and tax collection more regular. The reasoning is: better roads and inns improved movement; improved movement supported trade and administration; a reliable currency helped revenue and state finance. Option A is correct because it connects all these administrative effects. Option B is wrong because poetry competitions were not the main purpose of these reforms. Option C is wrong because Mughal painting was not what roads, sarais, and currency reform mainly achieved. Option D is wrong because closing Chola ports is unrelated to Sher Shah's reforms. Memory cue: Sher Shah means roads, sarais, currency, and efficient administration. The supplied answer is accurate.