Answer:
A- It contains a sestet.
Step-by-step explanation:
The Petrarchan sonnet is a sonnet with 14 lines and two subgroups- an octave and a sestet. The octave follows the rhyming scheme of ABBA ABBA and the sestet follows either CDE CDE or CDC CDC.
On the other hand, a Shakespearean sonnet have 14 lines with 4 subgroups, three quatrains and a couplet. Each line is phrased in an iambic pentameter and follows the rhyming scheme of ABAB CDCD EFEF GG. There is no sestet in a Shakespearean sonnet.