How did the Forest Research Institute at Dehradun strengthen commercial forestry?

Correct answer: It spread scientific forest management through trained officers

The direct answer is B: it spread scientific forest management through trained officers. The Forest Research Institute at Dehradun supported colonial forestry by studying trees, training forest officials, and teaching methods for surveying, planting, cutting, and controlling forests. The reasoning is: training created knowledgeable officers; officers applied official rules; scientific management helped select timber and organise production for railways and other needs. Option A is wrong because colonial forestry generally restricted many customary local rights rather than giving all rights to local people. Option B is correct because training and scientific administration are its central connection. Option C is wrong because the institute did not end forest laws; it worked within and supported the forest administration. Option D is wrong because commercial forestry aimed to maintain or increase useful timber production, not stop it. Memory cue: Dehradun means forest research and trained forest officers. The supplied answer is accurate.