Explanation:

Turpentine is primarily obtained through the distillation of resin collected from pine trees. This process involves heating the resin to separate the volatile turpentine oil from the non-volatile rosin. Therefore, option D is the correct method. Option A, sublimation, is a phase transition from solid directly to gas, which is not how turpentine is extracted. Option B, decantation, involves separating immiscible liquids or a liquid from a solid by pouring off the top layer, which is unsuitable for resin. Option C, sedimentation, is the process where particles settle out of a fluid, also not applicable for turpentine extraction from resin. Thus, A, B, and C are incorrect processes.