The correct answer is: A) Simplifying business approvals.
TS-iPASS is a one-stop shop for businesses to obtain all the necessary approvals and permits from the government. It aims to reduce the time and cost of doing business in Thailand.
Option B is incorrect because TS-iPASS is not a policy aimed at reforming the tax system. The Thai government has a separate policy for reforming the tax system.
Option C is incorrect because TS-iPASS is not a policy aimed at improving agricultural productivity. The Thai government has a separate policy for improving agricultural productivity.
Option D is incorrect because TS-iPASS is not a policy aimed at expanding social welfare programs. The Thai government has a separate policy for expanding social welfare programs.