As a Manager You Provide an Annual Performance Evaluation to Each

As a manager you provide an annual performance evaluation to each of your employees. You are looking for other ways to provide performance feedback to employees. Which of the following would be the most effective approach to accomplish this?

A) Discuss performance issues with an employee in front of their coworkers.
B) Post examples of errors made by employees in the breakroom from which everyone can learn.
C) Keep a log of an employee's performance issues and provide it to them quarterly to read.
D) Schedule routine "check ins" with each employee to discuss accomplishments and challenges.
E) Send a thank you card to each employee annually expressing your appreciation for their efforts.