Which of the business messages described below is best suited for an email?

Question $8$ options:

Charles wants to send a summary of yesterday's meeting to those that attended.

Catherine wants to send a harsh critique of a colleague's economic analysis.

Francois has to notify an employee that he is on probation.

Nina needs to send a report about possible sexual abuse in the company.

Toni wants to convey her opinion about a sensitive issue to her boss.