The Petrarchan sonnet is divided into two parts:
1. The octave (first 8 lines) with the rhyme scheme ABBAABBA.
2. The sestet (last 6 lines) with a flexible rhyme scheme, often CDECDE.
Other common variations include CDCDCD or CDEDCE
Option (C) is the standard rhyme scheme for a Petrarchan sonnet..