SOMEONE HELP ASAP !! SELECT ALL OF THE FOLLOWING THAT ARE TRUE

The graph below shows the number of birds with a given beak depth in a certain location. Data was collected before the
white columns) and after (the black columns) a drought. For example, before the drought, about 30 birds with a beak
depth of 8.3 mm were counted. Which of the three statements below are best supported by the data in the graph?

A. Longer beaks are more advantageous in drought conditions
B. No birds with beaks exceeding 11 mm have been counted
C. Beaks shorter than 10 mm are never advantageous
D. A drought can cause some beak depths to disappear
E. The drought caused the bird population to decrease
F. Only birds with beak depths greater than 9.3 mm will survive a drought