Which statement about iambic pentameter, which is used in "Sonnet 29,” is correct?
a. An iamb consists of two unstressed syllables followed by two stressed syllables.
b. An iamb consists of a unstressed syllable followed by a stressed syllable.
c. An iamb consists of a stressed syllable followed by another stressed syllable.
d. An iamb consists of five stressed syllables followed by five unstressed syllables.