Which of the following goals satisfies the SMART criteria?

a$.$

A restaurant wants to reduce employee turnover by $40\%$ within the next $6$ months by giving workers longer shifts.

b$.$

A software company wants to improve customer satisfaction by $25\%$ within the next quarter, using customer satisfaction surveys at the end of each sale and implementation.

c$.$

A real estate agency wants to sell $100$ houses within the next week.

d$.$

A construction company wants to become the largest in the country eventually.

e$.$

A law firm wants to increase profits by $15\%$ within the next month.

f$.$

A clothing store wants to increase sales by $50\%$ within the next year.