Natural variations:
A. lead to occasional false findings that processes are out of control.
B. play no role in statistical process control.
C. are variations that are to be identified and investigated.
D. are the same as assignable variations.
E. are variations that can be traced to a specific cause.

A

Explanation:

Natural variation also called random or chance variation is the the statistical analysis of natural fluctuations in the process outputs. It occurs when processes does not follow an accurate pattern thereby resulting into quality issues.

The knowledge of the natural variation is necessary to avoid making unnecessary adjustments to the process. Natural variability is the total effect of different minor factors. For example, older machines will show a higher level of natural variability when compared with newer machines because of worn parts and also because newer machines may have design improvements that curtail its output variability.