17. Find out about what you want to investigate. Read books, articles, journals, magazines or ask professionals to learn about the effect or area of study. A. Gathering data
B. Formulating a hypothesis
C. Analyzing data
D. Drawing conclusion

Answer listing the cosequences of the options;

Of that are from eating black  foods or iron supplements. the most common condition causing  it is a bleeding ulcer.  black poop caused by blood indicate a problem in the upper digestive tract.     along with pain, vomiting, or diarrhea is cause to see a doctor right go see a doctor