Nitrogen and carbon dioxide in the primitive atmosphere were linked with which source?

Correct answer: Volcanic emissions

Volcanic emissions were an important source of gases in Earth’s primitive atmosphere, including nitrogen, carbon dioxide, water vapour and other gases. As the young planet remained hot and volcanically active, gases released from its interior accumulated around the surface through outgassing. This process helped create a secondary atmosphere after much of the earliest light gas envelope had been lost. Modern vehicles and farm machines appeared only after human technological development, while artificial satellites are even later human-made objects; none could have contributed to the primitive atmosphere. Hence, volcanic emissions make option A correct.