Given the FMEA data provided in the table below:

Failure Cause

Severity

Occurrence

Undetectability

M

$5$

$2$

$1$

N

$3$

$4$

$9$

X

$2$

$2$

$3$

Y

$7$

$3$

$2$

Z

$9$

$1$

$5$

Which failure cause would be of least concern?

Group of answer choices

M

N

X

Y

Z