Does Thomas Hobbes think that fear is the only reason for obeying the sovereign?

The English philosopher Thomas Hobbes (1588-1679) is best known for his political thought, and deservedly so. His vision of the world is strikingly original and still relevant to contemporary politics. His main concern is the problem of social and political order: how human beings can live together in peace and avoid the danger and fear of civil conflict. He poses stark alternatives: we should give our obedience to an unaccountable sovereign (a person or group empowered to decide every social and political issue). Otherwise what awaits us is a state of nature that closely resembles civil war – a situation of universal insecurity, where all have reason to fear violent death and where rewarding human cooperation is all but impossible.  One controversy has dominated interpretations of Hobbes. Does he see human beings as purely self-interested or egoistic? Several passages support such a reading, leading some to think that his political conclusions can be avoided if we adopt a more realistic picture of human nature. However, most scholars now accept that Hobbes himself had a much more complex view of human motivation. A major theme below will be why the problems he poses cannot be avoided simply by taking a less selfish view of human nature.

c is the answer because first she would blush to make the reader wonder why which they find out in the next line.