Frederick, a new manager, is faced with the task of estimating the timeline for completion of a project. Which of the following should he do if he decides to follow the evidence$-$based leadership approach?

a$.$ Use the methods that have proven to be effective in similar situations

b$.$ Delegate the responsibility to his subordinates

c$.$ Maintain a log of his interactions with group members and their activities

d$.$ Consult with his team members on how to estimate a timeline