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 Fi ndKey Words{ public static void mai n(sri ng[]args){ sti ng text = "An array is a data structur that stores a collection of" +"values of the same type .You access eachi ndividu-al value" +"through an i nteger i ndex .For example ,if a is anarray" +"of i nergers ,then a[i]is the ith i nteger i n the ar-ray ."; Int arrayCount =0; Int idex =-1; Sti ng arrarStr ="array"; Index =text .i ndexof(arrayStr); While(i nde_________x 0){ ++arrayCount ; Index +=arrayStr .length(); Index =text .i ndexof(arrayStr ,i ndex); } Syste m.out .pri ntln ("the text contai ns"+arrayCount +"arrays"); } } A.＜ B.＝ C.＜＝ D.＞＝