Which of the following equations correctly represents the mechanism of enzyme action?

• A
  $E + S \rightarrow E + P$
• B
  $E + S \rightarrow E \cdot S \text{-Complex} \rightarrow E + P$
• C
  $E + P \rightarrow E \cdot P \text{-Complex} \rightarrow E + P$
• D
  $P + S \rightarrow E \cdot S \text{-Complex} \rightarrow E + S$