Note: You have already provided the answer. I will just add an explanation.
Answer:
The underlined word is "censure". The best definition for it as it is used in the sentence is:
B. an expression of disapproval or condemnation
Explanation:
The word "censure" refers to a vehement (strong) disapproval or criticism. If you censure someone for their behavior, that means you condemn such behavior and express your opinion in a severe manner to that person. However, even if we didn't know what the word means on its own, we could have chosen option B by taking the context into consideration. The author is working with opposite ideas - good and bad, censure and praise. Therefore, if praise means an expression of admiration, censure must be its opposite.