The porosity log of a sand interval indicated a porosity reading of 18%. Theresistivity log indicated Rt = 22 Ω∙m. Rw is known to be 0.025 Ω∙m at formation temperature.What is the closest value to the water saturation in this sand interval?

(A) 15%
(B) 16%
(C) 17%
(D) 18%
(E) 22%