When does the recruitment process start and end?

A$.$ The process starts when job postings are made publicly available and ends when the ideal candidate is selected.

B$.$ The process starts when job postings are made publicly available and ends when the job postings are taken down.

C$.$ The process starts with the identification of a position that needs to be filled and ends when the ideal candidate is selected.

D$.$ The process starts with the identification of a position that needs to be filled and ends when information is received from an adequate number of applicants.