Which of the following statements is true of the pictograms on HCS labels?a. Pictograms on HCS labels are identical to those used on DOT transport labels and may have various background colors. b. Consist of four bars that are color-coded as blue, red, yellow, and white to match hazard.c. HCS pictograms are required and standardized red square-on-points with black hazard symbols and white backgrounds. d. All of the Above