안녕하세요 ㅠㅠ

No one knows exactly how big China's internet police force is these days, although estimates run

as high as 40,000. but _________ , its sophistication is less than ever.

(a) whatever its scale is

(d) whatever it's scale is

(a) 답인데요 (d)는 왜 답이 아닌가요 ㅠㅠ?