You define the following regular expression of currency values:regex tx = new regex(^-?\d+(\.\d{2})?$)You are required to write code that will be used to find whether a string in the variable named Bill matches the regular expression or not. You are also required to use this code as the expression in a conditional statement and need to know which code segment to use.What should you do?（）
A.The tx.Matches（Bill）
B.The tx.Equals（Bill）
C.The tx.Match（Bill）
D.The tx.IsMatch（Bill）
参考答案：D
