Adjustable life insurance, per Virginia Code § 38.2-3113.1, blends whole and term features, allowing policyowners to adjust face amount and premiums. Option B is true; simultaneous changes (e.g., increasing face amount and premium) are possible, adapting coverage and cash value. Option A is false; higher premiums typically increase cash value, not decrease it, unless misallocated. Option C is incorrect; increasing face amount doesn’t inherently extend term duration—it adjusts cost or cash value. Option D is false; face amount increases don’t shorten whole life premium periods, which are fixed or flexible based on design. The study guide likely highlights adjustability with examples—e.g., raising $100,000 to $150,000 with a premium hike—making B the true capability.