The speaker seems to suggest that nature is difficult to understand, so the answer is B.
The answer is, South Korean education probably receives more funding than education in China.
<span>The occupation of physician is more highly valued than that of bus driver and requires much more sacrifice in terms of education and training. This lead to only a handful of people could become a physician but many more could took the job as bus driver.
Since the physician is significantly 'rarer' and harder to train compared to bus driver, society reward the job with higher pay.</span>
