As per the question, the given sentence reflects a 'properly constructed sentence' as it is both syntactically and semantically appropriate. T<u>he first part of the sentence prior to comma correctly displays the purpose i.e. 'to keep your files in order' while the latter part of the sentence mirrors how the purpose can be solved</u> by 'learning the filing rules.' Thus, it conveys the meaning of the sentence most <u>adequately</u> without any confusion since it is appropriately <u>structured and punctuated</u>. Therefore, <u>option A</u> is the correct answer.
