Note: Like many difficult Agree/Disagree questions, part of the difficulty of this question derives from the fact that first, we're being asked to do an MSS question on Tania's statements. Only after can we do the Disagree question. Stated another way, the disagreement is not explicitly stated for Tania (while it is for Monique). It's implicit (in an MSS way) from Tania's statements.
Tania never says that all art criticism is biased. But you can derive that conclusion from what Tania does say. It's like if I asked you to look at Tania's statements and ask you to pretend that it was an MSS question. What answer could you come up with? You could come up with "all art criticism is biased." Having finished up this MSS question, now we are properly armed to tackle the disagree question.
This is very similar to Question 17 in the same section.