The correct option is A Ineffective in its teachings
Option B is the correct answer. The speaker does indeed regard the church ineffective in its teachings. The speaker states that though the church exists, the people are responsible for their follies and vices and their behaviour that they so brutishly exhibit in the church and outside of it. The passage tells us that though the church teaches us the manners and piety of the world, we disregard the virtues for for the easier paths of comfort and vice and sin. Options A,C,D and E are not congruent with the tone of the text and thus, are inappropriate in this context.