Causation can be proved by using an

It is important to have a bowel movement every single day

Which of the following is not a symptom of chronic fatigue syndrome

Viruses ) manufacture their own atp, proteins, and nucleic acidsb) use the host cell to copy themselves and make viral proteinsc) use the host cell to copy themselves and then viruses synthesize their own proteinsd) metabolize food and produce their own atp