Avon Products at one point secured information about its biggest rival, Mary Kay Cosmetics, by having its personnel search through the garbage bins outside MKC$\text{'}$s headquarters. This is an example of

a$)$ lawful but probably unethical gathering of competitive intelligence.

b$)$ lawful gathering of competitive intelligence.

c$)$ strategic moves rivals are likely to make next.

d$)$ how companies in an industry can sustain good track records for revenue growth and profitability.