Answer:
An alternative pattern in blank verse in which two lines of iambic pentameter are rhymed is called:
B. a heroic couplet
Step-by-step explanation:
A couplet can be defined as two successive lines that rhyme and present the same length. A heroic couplet, in its turn, is a couplet written in iambic pentameter. Iambic pentameter is a five-time repetition of an unstressed syllable followed by a stressed one.
Heroic couplets are traditional in English poetry, both in epic and narrative poetry. Its use was pioneered by Geoffrey Chaucer in the "Legend of Good Women" and the "Canterbury Tales".