The answer is C. This is because nucleotide elongation involves the addition of a nucleotide to the 3 prime carbon of the previous nucleotide carbon ring. This involves a dehydration reaction between the phosphate group on the 5 prime carbon of the last nucleotide to the hydroxyl group of the 3 prime carbon of the previous nucleotide.
Four satellites are needed to find your location. GPS's get the signal from satellites and that can calculate the distance you are from those satellites and location. the satellites emit high frequency low power signals that your GPS can pick up.
