The famous scientist and science historian Price said: If K represents the number of people involved in a certain professional field, then the square root of this number is roughly equal to the number of the top group of people who make a half contribution to this field. Based on the above definition, which of the following is in line with Price's point of view? ["A country's publishing association counted its national journals and found that there are about 150 journals related to the economy, and half of all economic-related scientific papers have been published in 13 of them.", "There is a 200,000 agricultural population in a county. Statistics show that in the past year, about half of the county's total grain output was contributed by about 450 large grain growers.", 'An organization counted the performances of public concerts held around the world in the past year and found that all performances were performed by about 250 composers, about half of which were from 16 composers.', 'An online store selling luxury goods has received 100,000 visits in the past year, but about half of all sales, last year were provided by about 300 of them.']