According to the passage, in order for a given antibody to bind to a given rhinoviral capsid, which of the following must be true? A. The capsid must have a deep "canyon" on each of its faces. B. The antibody must be specific to the molecular structure of the particular capsid. C. The capsid must separate from its nucleic acid before binding to an antibody. D. The antibody must bind to a particular cell-surface receptor before it can bind to a rhinovirus. E. The antibody must first enter a cell containing the particular rhinovirus.