A process with a process Sigma level of $6$ over the long term would be expected to produce which of the following?

Select one:

a$.$ Approximately $3\mathrm{.}4$ defects per $1$ Million Products

b$.$ Approximately $3\mathrm{.}4$ defects per $1$ Million Defect Opportunities

c$.$ Approximately $3\mathrm{.}4$ defects per $1$ Million Success Opportunities

d$.$ Approximately $3\mathrm{.}4$ defects per $1$ Million Process Opportunities