$64.$ A cleaning company uses $$10$ of chemicals, $$40$ of labor, and $$5$ of misc. expenses for each house it

cleans. After some quality complaints, the company has decided to increase its use of chemicals by

$50\%.$ By what $\%$ has multifactor productivity fallen?

a$)0\%$

b$)8\mathrm{.}3\%$

c$)25\%$

d$)50\%$

e$)$ none of the above or unable to determine.

$65.$ Among the ethical and social challenges facing operations managers are

a$)$ honoring stakeholder commitments

b$)$ maintaining a sustainable environment

c$)$ efficiently developing and producing safe, quality products

d$)$ providing a safe workplace

e$)$ all of the above

$66.$ Among the ethical and social challenges facing operations managers are

a$)$ honoring financial commitments

b$)$ maintaining a sustainable environment

c$)$ developing low$-$cost products

d$)$ providing an efficient workplace

e$)$ all of the above

$67.$ Which of the following is not among the ethical and social challenges facing operations managers?

a$)$ honoring stakeholder commitments

b$)$ maintaining a sustainable environment

c$)$ efficiently developing and producing safe, quality products

d$)$ increasing executive pay

e$)$ providing a safe workplace

$68.$ A business's stakeholders, whose conflicting perspectives cause ethical and social dilemmas, include:

a$)$ lenders

b$)$ suppliers

c$)$ owners

d$)$ employees

e$)$ all of the above