The New Silla Dynasty lasted from 668 AD to 935 AD.

• A. Koryo Dynasty (935 AD - 1392 AD)
• B. Chosun Dynasty (1392 AD - 1909 AD)
• C. New Silla Dynasty (668 AD - 935 AD)
• D. Muye Dobo Tongji (First complete martial arts book written in 1790 AD)

Answer: (C)

Matching historical dynasties to their dates is what this item tests. The 668 AD to 935 AD window is the period when Silla unified the Korean Peninsula and ruled as what many sources call Unified Silla or New Silla. It starts in 668, when Silla, with Tang support, defeated Baekje and Goguryeo and established control over the peninsula. It ends in 935, when the last Silla king was deposed and the Goryeo Dynasty began under Wang Geon. So this time span correctly identifies the New Silla Dynasty. The other options fall outside this interval: the Koryo Dynasty spans roughly 918 to 1392; Joseon spans 1392 to 1910; and Muye Dobo Tongji is a martial arts manual written in 1790, well after these dynasties.