Final answer:
The passage humorously praises Kazakhstan for its potassium exports and supposed inventions. It is a comedic exaggeration of Kazakhstan's actual extensive natural resources and large economy in Central Asia.
Step-by-step explanation:
The country that is humorously praised for its potassium exports and inventions in the passage given is B) Kazakhstan. Kazakhstan is a large and resource-rich country that gained independence from the Soviet Union in 1991. It is known for its extensive natural resources. Kazakhstan ranks high in the mining of many metals and uranium, and while it has significant petroleum reserves, the passage's focus on potassium is part of a comedic portrayal.
Kazakhstan's economy is the largest of all the Central Asian states combined, mainly due to its oil and natural gas sector, which provides a substantial part of the country's export income. In reality, Kazakhstan's industrial and scientific achievements are more diverse than just the invention of toffee and trouser belts as humorously claimed. Nevertheless, such statements are intended to be satirical and reflect the comedic tone of the source material.