Solution
Option 1 -> If income abroad increases, it adds to net factor income from abroad, so national income would not fall.
Option 2 -> National income includes income earned by domestic residents both at home and abroad. An increase in income earned abroad increases net factor income from abroad (NFIA), thereby raising national income.
Option 3 -> Income earned abroad is a component of national income (GNI = GDP + NFIA), so it cannot remain unaffected.
Option 4 -> There is no economic reasoning for national income to first fall and then rise when income abroad simply increases.
Hence, Option 2: National income is likely to rise -> National Income (or GNI) is calculated as GDP plus Net Factor Income from Abroad (NFIA). NFIA represents the difference between income earned abroad by domestic residents and income earned domestically by foreign residents. When income earned abroad by domestic residents increases (other things remaining constant), NFIA increases, which directly increases the national income of the domestic economy. This is why countries with significant populations working abroad often see their national income boosted by remittances and foreign earnings. -> correct
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