What is "Lean Six Sigma," and how does it combine the principles of Lean and Six Sigma?

a$)$ Lean Six Sigma is a financial strategy for cost reduction. It combines budgeting techniques with financial analysis.

b$)$ Lean Six Sigma is a project management approach that integrates Lean$$s focus on waste reduction and process speed with Six Sigma$$s emphasis on quality improvement and defect reduction.

c$)$ Lean Six Sigma is a marketing approach for enhancing brand loyalty. It combines customer feedback with loyalty programs.

d$)$ Lean Six Sigma is a supply chain strategy for inventory management. It combines just$-$in$-$time inventory with supplier performance evaluations.