The correct answer is C) Absorbent removal. The use of straw or reclaimed paper fibers to clean up an oil spill would be considered an absorbent removal method. Absorbents work by physically drawing the oil out of the water or off surfaces, trapping it within the material. Straw, paper fibers, and other natural or synthetic sorbents are commonly used for this purpose in oil spill response, as they can effectively remove oil from the environment. The other answer choices are incorrect because mechanical removal refers to physical means like skimmers or booms, chemical agents are substances used to break down or disperse the oil, and "none of the above" is not the appropriate answer given the information provided.