One way to narrow your topic by discovering the features most interesting to you is

B). Looping.

Explanation:

Looping is categorized under the pre-writing stage and is demonstrated as the free-writing process that aids to highlight your thoughts or ideas while searching the topic. Consecutive free-writings with a loop(of five to ten minutes) will help find a more specific and enhanced topic and also to form the basis for the thesis. Therefore, as per the question, one way to narrow the topic by discovering the most interesting features would be 'looping' as it proposes the freedom and liberty to look for a significant topic without taking too much burden. Thus, option B is the correct answer.

i it is b. but if its not sorry