How many books comprise the Psalter, and what is the general arc across these books?

• A. Five books (1–41, 42–72, 73–89, 90–106, 107–150); arc moves from lament and petition toward confidence in God's rule and mercy.
• B. Four books; arc moves from praise to despair.
• C. Six books; arc remains largely lament without resolution.
• D. Three books; arc climbs from fear to boastfulness.

Answer: (A)