You used the Subtotal feature on a dataset containing states, major cities within each state, and populations. You intended to create one subtotal for each state; however, a subtotal row displays below each city. What caused this result?

A$.$ The At a change in setting was City within the Subtotal dialog box.

B$.$ You filtered out the state names before using the Subtotal feature.

C$.$ You forgot to engage the Auto Outline feature before using the Subtotal feature.

D$.$ The data was sorted by state and further sorted by city.