Select all the true statements.
A. Given a dot plot, it is always possible to construct a corresponding histogram.
B. Given a dot plot, it is always possible to calculate the mean of the data.
C. Given a box plot, it is always possible to calculate the IQR of the data.
D. Given a histogram, it is always possible to calculate the mean of the data.
E. Given a histogram, it is always possible to calculate the median of the data.