The correct answer is C) Prior to abandonment, the immersion suit allows body movement such as walking, climbing a ladder and picking up small objects. This is correct because immersion suits are designed to provide thermal protection and allow the wearer to move and perform tasks prior to entering the water. The suit should not severely restrict movement or make it significantly more difficult to climb a ladder. Answer D is incorrect because it describes the suit as severely restricting the wearer. The other answer options are incorrect. Immersion suits are not flameproof and do not provide protection against swimming through burning oil (answer B), and they are not designed to provide prolonged protection against hypoglycemia for weeks (answer A).