A circuit contains a box with two electrical components inside it. The variable resistor is altered and readings are recorded to find the $I$-$V$ characteristic of the box, as illustrated. Which combination of two electrical components inside the box would match the measured $I$-$V$ characteristic most closely?
- Aa filament lamp and a fixed resistor in parallel
- Ba filament lamp and a fixed resistor in series
- Ca semiconductor diode and a filament lamp in parallel
- Da semiconductor diode and a filament lamp in series