My answer is B: They can be adjusted anytime since they don't affect alignment angles.
Option A is correct. Manufactures can change the Torsion bar to adjust the ride height. This is done to compensate the engine weight. Option C is correct. The torsion’s bar acquires a twisting motion on one end of the suspension, and is firmly fixed to the car’s frame at the other end. Actually, it attaches to the lower control ARM and a cross member key on the chassis frame. Option D is also correct. When a wheel passes over a bump, the Torsion bar acquires a twisting motion on one end of an object whose other end is fixed.