When acceptance number of a single sampling plan under attribute category is zero with sample size less than or equal to 10, the Operating Characteristic (OC) curve is

When acceptance number of a single sampling plan under attribute categ

1.	When acceptance number of a single sampling plan under attribute category is zero with sample size less than or equal to 10, the Operating Characteristic (OC) curve is
A.	A horizontal line
B.	A vertical line
C.	A convex function
D.	An inverted S-shaped curve
Answer» D. An inverted S-shaped curve