Which choice below correctly completes the sentence

answer:

well, if i knew what i was answering, i would give you a good answer. but there is nothing for me to answer, so, maybe make a new question involving what the person is supposed to answer.

explanation:

answer; polycythemia is the correct answer;

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.