Answer:
A. c-chart
Step-by-step explanation:
C chart is a control chart that is used to count the data like numbers of nonconformities per unit. It is used to monitor the total occurrence per unit.
In this chart, the data is collected in the sub-groups and then the data is analyze to check the defects or mistakes or nonconformities.
If there is more than one mistake per item the C- chart is the best match.