উত্তর সিলেক্ট করলে সঠিক ও ভুল দেখাবে।
ব্যাখ্যা ও সঠিক সমাধান
উত্তর:
China
The United States is the world's largest economy with a GDP of approximately $20.513 trillion, notably due to high average incomes, a large population, capital investment, low unemployment, high consumer spending, a relatively young population, and technological innovation.