D because high-density lipoprotein is found in healthy foods like beans... LDL is found in animal fats which can clog up the artery and increases the risk of heart problems unlike HDL.
C/ depression or A/ ephoria
i think is C
This is heavily disputed, and honestly, it varies on a person-by-person basis. Some people are visual learners (so it's effective for them to use videos and pictures to help them study), some prefer being hands-on, etc...
Generally though, I'd say the most effective method that works for most people is through visceralisation. This is the process of associating concepts, words. phrases etc. with your different senses (sound, touch, images...). You can read up more on it by searching up "visceralisation for studying".
What can I assist you with? These questions appear to be things you need to answer on your own, we don't know how your'e feeling.
C. starting a community garden