用英语解释一个数学现象,急请问是numbersgreater么?怎么查不到这个词？

what does the interval (2,9] represent?
A the sef of all numbers between 2 and 9
B the sef of all numbersgreater than or equal to 2 and less than 9
C the sef of all numbersgreater than or equal to 2 and less than or equal to 9
D the sef of all numbersgreater than 2 and less than or equal to 9

what does the interval (2,9] represent?
A the sef of all numbers between 2 and 9
B the sef of all numbersgreater than or equal to 2 and less than 9
C the sef of all numbersgreater than or equal to 2 and less than or equal to 9