Describe all similarities and differences between a frequency bar graph and a frequency histogram. Choose the correct answer below. A. Bar graphs and histograms can both be used to compare the sizes of different groups.Also, they can both be used with any numerical variable (discrete or cont touch. continuous). Histogram bars can touch, but bar-graph bars never B. Bar graphs and histograms can both be used to compare the sizes of different groups Bar-graph bars can touch.but histogram bars never touch. Histograms can be used with any numerical variable (discrete or continuous) and any number of observations, but bar graphs can only be used with discrete variables. C. Bar graphs and histograms can both be used to compare the sizes of different groups.Histogram bars can touch,but bar-graph bars never touch. Histograms can be used with any numerical variable (discrete or continuous) and any number of observations, but bar graphs can only be used with discrete variables. D. Bar graphs and histograms can both be used to compare the sizes of different groups. Histogram bars can touch, but bar-graph bars never touch. Bar graphs can be used with any numerical variable (discrete or continuous) and any number of observations but histograms can only be used with discrete variables.