The main function of nucleic acids is to

The main function of nucleic acids has to do with some of the storage and expression of the genetic's info. The deoxyribonucleic acid, it encodes the info that the cell's need to make some proteins.

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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.

the answer for this question would be d. glaciers