Jamal feels constantly interrupted by phone calls, making it difficult to get other work done. He has decided to schedule blocks of time when he will return the most important phone calls, allowing him to better concentrate on other work that needs to be done. Which of the following is Jamal using to manage the constant interruption of phone calls

a$.$ Global management skills

b$.$ Decision$-$making skills

c$.$ Technical skills

d$.$ Time management skills