What is the correct sequence of steps for preparing plant specimens in a herbarium?

• A
  Collection $\rightarrow$ Pressing $\rightarrow$ Drying $\rightarrow$ Mounting $\rightarrow$ Preservation
• B
  Collection $\rightarrow$ Drying $\rightarrow$ Pressing $\rightarrow$ Mounting $\rightarrow$ Preservation
• C
  Collection $\rightarrow$ Drying $\rightarrow$ Pressing $\rightarrow$ Preservation $\rightarrow$ Mounting
• D
  Collection $\rightarrow$ Pressing $\rightarrow$ Drying $\rightarrow$ Preservation $\rightarrow$ Mounting