Anyone can answer all?? Tysm. I have wrote half of them on my book but i don’t know if their correct. So far I know matter, mass, gas , volume and physical properties but i don’t know their fully correct

Which statement describing the stock market system is true? a. when stocks lose value it means the company is doing well. b. the value of stock can never fall . c. the value of stock can never rise d. companies sell stock to their businesses grow and become "public"