When natural process limits go beyond the customer specification limits$,$ which of the following should be the resulting course of action?

Negotiate specifications limits with customers

Center the process

Reduce variability

Eliminate some data

$1.$

d$)1,2,3$ and $4$

$2.$

c$)$ Only $1,2$ and $3$

$3.$

b$)$ Only $2,3$ and $4$

$4.$

a$)$ Only $1$ and $4$