B. Find and interpret the standard deviation of the number of floors in this data set. Select the correct choice below and fill in the answer box within your choice. (Type an integer or decimal rounded to the nearest tenth as needed.) A. The standard deviation of the number of floors of the tallest buildings is nothing . B. The standard deviation of the number of floors per city is nothing . C. The standard deviation of the number of floors in each city is nothing . D. The standard deviation of the number of floors in each tallest building is nothing .