First of all, you have only 1 sentence to work with. So you must glean everything you can from that one sentence. He is expressing a personal opinion in that summary. He's not saying it is good or bad. What he is saying is that in his opinion, the artist has conveyed what he saw that enclosed everything there was not only about the boats in Venice, but the boating culture.
Having said all of that, I would pick Judgment -- B.
This sentence does not tell you what it means to him and what details lead him to. If you like interpretation, for goodness sake use it. It is certainly not out of the ball park of possibilities.