Which of the following statement$($s$)$ is$($are$)$ true? $(5$ pts$)$

I. Temperature, height, length are examples of variables data.

II$.$ Control charts have no contribution in reducing variability.

III. Check sheet is a very useful tool for data collection activity.

a$)$ Only I

d$)1$ and II

b$)$ Only III

e$)$ I, II and III

c$)$ I and III