Please answer problem 5 and provide a thorough explanation of your answer/show your work.

NOTE: There is an option, the reason for this is that option is known to be incorrect

5. The plates of a parallel plate capacitor with capacitance C=31.0 pF are separated by 1.20 mm and the gap is filled with an unknown dielectric material. The plates have area of 7.5 cm2. Which of the following materials is most likely to be the unknown dielectric? A. Pyrex (K = 5.6) C. Teflon (K = 2.1) D. Neoprene (K = 6.7) E. Nylon (K = 3.4)