In which order do these events occur in human nutrition?

• A
  Digestion $\rightarrow$ ingestion $\rightarrow$ absorption $\rightarrow$ assimilation.
• B
  Digestion $\rightarrow$ ingestion $\rightarrow$ assimilation $\rightarrow$ absorption.
• C
  Ingestion $\rightarrow$ digestion $\rightarrow$ absorption $\rightarrow$ assimilation.
• D
  Ingestion $\rightarrow$ digestion $\rightarrow$ assimilation $\rightarrow$ absorption.