Final answer:
The correct frequency range for a localizer is 108.10-111.95 MHz and its CDI has a full-scale deflection of 2 dots.
Step-by-step explanation:
The frequency range for a localizer, which is a component of an Instrument Landing System (ILS), is 108.10-111.95 MHz. The correct option regarding the frequency range and Course Deviation Indicator (CDI) deflection scale is (a) 108.10-111.95 MHz, Full-scale deflection is 2 dots. This means that when the aircraft is on the localizer's centerline, the CDI needle is centered. A full-scale deflection occurs when the aircraft is outside the acceptable range to be considered on the 'course', which is typically represented by 2.5 degrees either side of the centerline for most localizers. A single dot of deflection on the CDI is equal to half that amount, or approximately 1.25 degrees.