Answer:
C. practicality.
Step-by-step explanation:
The theme that Bradstreet commonly expresses in her writing and that best reflects her Puritan beliefs is that of practicality. Practicality was a principle that Puritans greatly valued. They believed that practicality was the way in which they could best follow the teachings of God. This is an idea that is present in many of Bradstreet's writings.