Which of these would NOT be considered the result of a logic bomb?

a$.$ Erase the hard drives of all the servers $90$ days after Alfredo's name is removed from the list of current employees.

b$.$ Delete all human resource records regarding Augustine one month after he leaves the company.

c$.$ Send an email to Rowan's inbox each Monday morning with the agenda of that week's department meeting.

d$.$ If the company's stock price drops below $$50,$ then credit Oscar's retirement account with one additional year of retirement credit.