There are 10 syllables in a line and they follow a regular pattern: an unstressed syllable followed by a stressed one. This line is called a(an) （）line.

There are 10 syllables in a line and they follow a regular pattern: an unstressed syllable followed by a stressed one. This line is called a(an) （）line.
A.iambic pentameter
B.iambic tetrameter
C.trochaic pentameter
D.trochaic tetrameter
正确答案：iambic pentameter