API Standard 653 defines the "Critical Zone" for repairs to tank bottoms as what?

That portion of the bottom or annular plate within 3" from the inside edge of the shell, measured radially inward

Within the annular plate ring, within 12 inches of the shell, or within 12 inches of the inside edge of the annular plate ring

That portion of the bottom or annular plate within 6" from the inside edge of the shell, measured radially inward

Within the annular plate ring, within 3" of the shell, or within 12 inches of the inside edge of the annular plate ring