\textbf{variance is used to measure the spread of data. A, B, C, E are densely distributed.We can verify by calculating the variances out. (A) 2.5, (B) 0.598, (C) 0, (D) 50, (E) 2} 
\textbf{Which of the following data sets has the largest standard deviation?} 
A) \textbf{{100, 101, 102, 103, 104}} 
B) \textbf{{1000.3, 999.56, 1000.49, 1000, 998.32}} 
C) \textbf{{1, 1, 1, 1, 1}} 
D) \textbf{{5, 10, 15, 20, 25}} 
E) \textbf{{1, 2, 3, 4, 5}} 