The four differing nucleotide parts, called bases, are made of a few:Immersive Reader A. Carbon and oxygen atoms

B. Hydrogen atoms

C. Nitrogen and phosphorus atoms

D. All of the above

the answer is; comparing the frequency of collisions with and without the device

this makes the anti-collision system an independent variable and the collisions a dependent variable. if there are fewer collisions with an anti-collision system that without, then it can be stated that the system is a success. essentially, collisions under an anti-collision system are compared with the frequency of collisions by cars with the human drivers.