Concept:A Shakespearean sonnet is built from three four-line stanzas followed by one two-line stanza.
Explanation:Each four-line stanza is called a quatrain.
The Shakespearean sonnet therefore contains three quatrains.
After these three quatrains, it ends with a final rhymed couplet.
Since the question asks about the third stanza, it is the third quatrain.
The octave and sestet belong to the Petrarchan sonnet, not the Shakespearean form.
Answer:The correct option is A. quatrain.