I agree that there was a misinterpretation of the paragraph, and sometimes we indeed choose an option just because it “sounds good” or has a “good meaning”, even if it is not supported by the text. However, the correct answer was not C, but D: “Establish realistic goals for themselves in practicing reflection.” The paragraph mentions that the teachers had difficulties in devoting sufficient time to reflection, which shows that they failed to establish realistic goals in their reflective practice.

Regarding your strategy, I think it is a good idea to carefully analyze the words that do or do not appear in the text and the options. I would also add underlining key phrases while reading and comparing each option directly with what the text says, so as not to assume information that is not explicit.