The internal stabilizer is also called "automatic stabilizer", which refers to the automatic stabilization factors in the fiscal system. When the economy is in a recession or overheating, it does not need to change the economic policy of the government, it can automatically play a role in controlling the recession or suppressing overheating of the economy:. According to the definition above, which of the following is the role of the intrinsic stabilizer in the following options? [' to the progressive tax system on the tax system, taxation tends to rise when the economy is overheated, and tends to decline when the economy is depressed, thus playing a role in stabilizing the economy.', 'The government stabilizes the economy by increasing investment in times of economic depression and reducing investment in times of overheating.', 'When the economy is depressed, the government increases the money supply, and when the economy is overheating, it reduces the money supply, thus stabilizing the economy.', 'ing a recession, the government promotes economic recovery by formulating trade policies that encourage exports.']