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){ String 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; String 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. >=