When Looking at a Dashboard Panel That Is Based on a Report

When looking at a dashboard panel that is based on a report, which of the following is true?

A) You can modify the search string in the panel, and you can change and configure the visualization.
B) You can modify the search string in the panel, but you cannot change and configure the visualization.
C) You cannot modify the search string in the panel, but you can change and configure the visualization.
D) You cannot modify the search string in the panel, and you cannot change and configure the visualization.