Although her boyfriend treats her well, always puts her needs first, and doesn’t demand much in the way of relationship effort from her, Courtney feels unsatisfied with the relationship because a...

Although her boyfriend treats her well, always puts her needs first, and doesn’t demand much in the way of relationship effort from her, Courtney feels unsatisfied with the relationship because a little voice in her head keeps telling her there must be an even better mate out there for her somewhere. Courtney seems to have

a. a high comparison level.

 b. a low comparison level.

 c. a low comparison level for alternatives.

d. a high sense of investment.