Explanation

Under Basel II, the supervisory backtesting framework includes:

• Finding the number of exceptions (Option B) - This is a core component where the number of times actual losses exceed VaR estimates is counted
• Extending over a 1-year period (250 trading days) (Option C) - The backtesting is conducted over a minimum of one year of daily data
• A multiplier subject to a floor of three (Option D) - The scaling factor for the market risk capital charge has a minimum value of 3

However, Option A (Seven zones with different plus factors) is NOT part of the Basel II backtesting framework. The Basel framework actually uses three zones (green, yellow, and red) rather than seven zones:

• Green zone: 0-4 exceptions (no penalty)
• Yellow zone: 5-9 exceptions (increasing penalties)
• Red zone: 10+ exceptions (serious deficiencies)

The seven-zone system with different plus factors is not part of the Basel II requirements for backtesting.