Explain one reason why a named country has achieved 'High Income' status

The World Bank defines a high-income country as one with a gross national income per capita exceeding $12,056. The gross national income (GNI) is calculated by adding gross domestic product to factor incomes from foreign residents, then subtracting income earned by non-residents.A high-income economy is defined by the World Bank as a nation with a gross national income per capita of US$12,696 or more in 2020, calculated using the Atlas method. While the term "high-income" is often used interchangeably with "First World" and "developed country", the technical definitions of these terms differ.Canada has the third highest total estimated value of natural resources, valued at US$33.2 trillion in 2019. It has the world's third largest proven petroleum reserves and is the fourth largest exporter of petroleum. It is also the fourth largest exporter of natural gas.

Iam pretty sure it is answer c. meep i hope you have a great day ^^