Which of the following can pose a danger to motorcyclists?
a. potholes and other cracks in a roadway
b. wet, slippery roads
c. pavement seams
d. railroad crossings
e. all of the above

All of those can pose as dangers to motorcyclists so the answer would be E. All of the above

ive noticed that too but is this a question

melody. a series of single tones which add up to a recognizable whole is called a what kind of layers of sound are heard melody or harmony. how many layers