What is the difference between formative and summative assessment in edTPA context?

What is the difference between formative and summative assessment in edTPA context?

• A. Formative assessment informs ongoing instruction to support learning; summative assessment provides evidence of mastery at the end of a unit or segment.
• B. Formative assessments are graded; summative assessments are ungraded.
• C. Formative assessments happen at the end of the unit; summative happen mid-unit.
• D. Formative assessments are more expensive to administer than summative ones.

Answer: (A)