Final answer:
Information in DNA is stored in the sequence of nitrogenous bases (option B), which are part of nucleotides that make up the double helix structure of DNA.
Step-by-step explanation:
Along the length of the DNA strand, information is stored in the sequence of nitrogenous bases. DNA is made up of a long chain of nucleotides, each consisting of a 5-carbon sugar, a phosphate group, and a nitrogen-containing base. These nucleotides are connected to form the familiar double helix structure of DNA, where the sequence of nitrogenous bases encodes the genetic information necessary for the synthesis of proteins. Each nucleotide's base pairs specifically with another base: adenine (A) pairs with thymine (T), and cytosine (C) pairs with guanine (G), held together by hydrogen bonds.