IDNStudy.com, kung saan nagtatagpo ang mga tanong at sagot. Makakuha ng impormasyon mula sa aming mga eksperto, na nagbibigay ng maaasahang sagot sa lahat ng iyong mga tanong.
Answer/Explanation:
It must be prepared for when you're main solution doesn't work well. An alternative solution is a must because not everything you think can solve well. You must have a plan B if plan A didn't work.