The sentence that best describes the chief characteristics of blank verse is B - it is in iambic pentameter and doesn't rhyme. Iambic means that an unstressed syllable is followed by a stressed one. Pentameter means that there are 5 meters, and given that one meter consists of 2 syllables, a pentameter is a type of meter that consists of 10 syllables. This is a type of writing that Shakespear almost exclusively used in his plays.