单项选择题

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(arravStr);
While(index______0)
++arrayCount;
Index+=arrayStr.length();
Index=text.indexof(arrayStr,index);

System.out.println
("the text contains"+arrayCount+"arrays");