请回答图片的问题，提供答案---**Question Stem:** 第35题 问号处应该填入多少? (What number should be filled in at the question mark?) **Diagram Description:** The image displays three large triangles arranged horizontally. Each large triangle is divided by one horizontal line and two lines connecting the midpoints of the sides, forming four internal regions (one small triangle at the top, one trapezoid below it divided into two smaller triangles). Numbers are placed within these regions. * **First Triangle:** * Top region: 2 * Middle left region: 25 (appears to be in the larger trapezoid area, potentially the sum/result of operations on the surrounding numbers) * Bottom left region: 6 * Bottom right region: 5 * **Second Triangle:** * Top region: 8 * Middle left region: 17 (appears to be in the larger trapezoid area) * Bottom left region: 2 * Bottom right region: 9 * **Third Triangle:** * Top region: 9 * Middle left region: ? (question mark in the larger trapezoid area) * Bottom left region: 1 * Bottom right region: 6 **Options:** (A) 12 (B) 14 (C) 16 (D) 18 (E) 20 **Other Relevant Text:** 王玉老师 (Wang Yu Laoshi - Teacher Wang Yu) appears written on the image in two places.