To make compost tea you just need a covered container, compost, water, and time. I use a cotton pillowcase or a square of unbleached cotton. I move the bundle up and down a few times whenever I walk by the container.
More generally, the terms exergonic and endergonic relate to the free energy change in any process, not just chemical reactions. An example of an exergonic reaction is cellular respiration. By contrast, the terms exothermic and endothermic relate to the overall exchange of heat during a process.
Answer D. An endergonic reaction is one that requires energy to proceed (aka it is an uphill reaction with a positive free energy change). The synthesis of glucose from carbon dioxide and water requires an energy input (usually in the form of photons captured by photosynthetic leaf cells) in order to proceed uphill.