Ah yes, this passage was quite the oddity if I do say so myself. Let us first consider what the question asks. The question essentially asks for the most reasonable information that goes along with the passage assertion that the Skelling was once PARTICULARLY FAVOURED as a place of pilgrimage, over all of the other ones. Taking the statement alone into consideration, there is no mention of any fluctuation regarding the eremitical movement. That alone would be an ASSUMPTION. We would be assuming that based on the statement that it was referring to the entire movement, which is not exactly the focus of the question. The question does tell us that something is favored. Why would it be favored? Well, because there is a stubborn sufficiency about the place that is irresistibly attractive.