How do you distinguish an effective positioning statement from an ineffective one?

Question $1$ options:

a$)$

After hearing an ineffective position statement you have clarity about what a company is offering.

b$)$

The effective positioning statement includes all five key positioning statement elements, and an ineffective one leaves out some of the key elements.

c$)$

An effective positioning statement leaves the target market with questions about how one product, service, or brand is superior to another.