下列程序的功能是统计字符串中“array”的个数，在程序的空白处应填入的正确选项是　　public class FindKeyWords{　　public static void main(sring[] args){　　sting text=　　“ An array is a data structur that stores a collection of”　　+ “values of the same type . You access each individual value”　　+ “through an integer index . For example,if a is an array”　　+ “of inergers, then a[i] is the ith integer in the array.”;　　Int arrayCount =0;　　Int idex = -1;　　Sting arrarStr =”array”;　　Index = text.indexof(arrayStr);　　While(index 0) {　　++arrayCount;　　Index += arrayStr.length();　　Index = text.indexof(arrayStr,index);　　}　　System.out.println　　(“the text contains” + arrayCount + “arrays”);　　}　　}

A．<

B．=

C．<=

D．>=