Kai began the research process by asking, "How does playing a musical instrument improve academic performance?" Now, he needs to modify his major research question as a result of his research. Which question narrows the focus of his research?

answer: the four parts of the "australian ballot" 1. the ballot paper is printed at public expense. 2. the ballot paper lists all candidates by position, as well as any other propositions. 3. ballot papers are distributed only at the polling place. 4. ballot papers are filled out by the voter in private. (secret ballot).

the correct answer is option d. none of these. it is noted that options a, b, and c share the same content.

despite the valid answer provided at the last sentence of each of the options, a question/answer format shouldn't include humourous themed responses such as "you bet your thermal pj's we do." - unless of course, the answer is carried out in an informal environment. this could be replaced with a simple "yes" or "it is necessary".

the question should be re-phrased to a more appropiate syntaxis. instead of "do we need the greenhouse effect? ", it should be written as "is the greenhouse effect necessary? " in order to give it a general scope, instead of limiting the answer to the needs of "we" the humans.