Directions: The scatter diagram shows the number of students passing in the high school examination in the given years from the four houses of a public school.

The number of students keeps on increasing by 50 every years. In 1998, there were 250 students. For which of the following years is the performance best in the school?

A. 1998

B. 2000

C. 1999

D. Cannot be determined

Please do not use chat terms. Example: avoid using "grt" instead of "great".