Hard, rough and durable granite stone ballast Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â gauge, shall be used.

Hard, rough and durable granite stone ballast Â Â Â Â Â Â�

1.	Hard, rough and durable granite stone ballast Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â gauge, shall be used.
A.	100 mm
B.	20 mm
C.	1mm
D.	60mm
Answer» E.