Tasks $1,2,$ and $3$ are selected in the image below. What will result when the Insert Summary Task menu option is selected?

a

A new summary task and a subtask are created and replace the selected rows.

b

A new summary task is created above the selected tasks and the selected tasks become subtasks beneath the summary task.

c

An error occurs as you cannot have tasks selected when you insert a new summary task.

d

A new task is inserted above and at the same level as the selected tasks.