Answer:
B) The ‘availability’ attribute is set as ‘in stock’
Explanation:
A data feed in computer terms means a mechanism that provides the users an ongoing data streams from the server.
It is a method of sending the correct update information to the client from the source.
Web feed is the most popular form of data feed that gives real time information to the clients.
Catherine's data feed is getting disapproved the 'availability' attribute in her web data feed is currently set as 'in stock'. So it is getting disapproved by the server.
Thus, the answer is B) The ‘availability’ attribute is set as ‘in stock’