What does net profit margin indicate about a company?

a$)$ The total revenue a company earns from its operations.

b$)$ The efficiency at which a company turns revenue into profit.

c$)$ The amount of cash a company has on hand.

d$)$ The company's total expenses in relation to its investments.

Six Sigma aims to reduce defects in any process. To achieve this, a Six Sigma process is expected to not produce more than how many defects per million opportunities?

a$)1,000$ defects.

b$)3\mathrm{.}4$ defects.

c$)10,000$ defects.

d$)100$ defects.