6991. Before my work on the writer appeared there were many vague ideas afloat about him.

✅ The correct answer is option A.
Circulating : move continuously or freely through a closed system or area.

Prevalent : widespread in a particular area or at a particular time.

Stagnant : (of a body of water or the atmosphere of a confined space) having no current or flow and often having an unpleasant smell as a consequence.

Primitive : relating to, denoting, or preserving the character of an early stage in the evolutionary or historical development of something.

Afloat : in general circulation; current.

Synonym of Afloat is Circulating