Which of the following statements about these signs is true?

a. sign a warns drivers to look out for hazards to their right.
b. sign b directs drivers to use a low gear.
c. sign a means the road ahead curves to the right.
d. both signs are regulatory.

  to change the number of rows and columns displayed by the excel object a. select the object and drag a size handle on the active object. b. deselect the object and drag a size handle of the object. c. deselect the object and drag a row or column divider of the object. d. select the object and drag a row or column divider on the active object.