Water is less at lower temperatures because hydrogen bonds are more and bond to each of its neighbors. a. solid, unstable b. liquid, stable c. dense, stable

the most logical answer would be a

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.