Tasks A and B have a duration of two days. Task A starts on Day 1, and Task B starts on Day 3. Tasks C and D have a duration of three days, and Task E has a duration of four days. Task C starts after Task A. Task D and E start after Task C. If Task A starts on December 15, which of the following is the anticipated start date for Task D?

A. December 18
B. December 19
C. December 20
D. December 21
E. December 22