A Warrior Race

"Even half drunk, Klingons are among the best warriors in the galaxy." – The Doctor. The Klingons are a humanoid warrior species that originated from the planet Qo'noS (pronounced Kronos), an M-class planet. One of the major powers of the galaxy, the Klingons were a proud, tradition-bound people who valued honor and combat. The aggressive Klingon culture had made them an interstellar military power to be respected and feared. The warrior ethos had been an important aspect of Klingon society since the time of Kahless, but the warrior aspects became much more dominant beginning in the early 22nd century. Previously, Klingon society was regarded as socially balanced, but over time, the warrior caste gained greater prominence, to the point where the Klingons widely came to be regarded as a "warrior race." Klingons are recurring antagonists in the 1960s television series Star Trek: The Original Series, and have appeared in all five spin-off series, along with eight of the feature films. - memor-alpha.org
QUESTION FOR FINAL COORDINATES: Klingons from Star Trek: The Original Series in the 1960s differed physically from Klingons featured in future movies and series how?
A. They wore no clothes. - N39 25.358 W087 25.845
B. They were a friendly race. - N39 25.177 W087 25.354
C. They were telepathic. - N39 25.457 W087 25.999
D. They did not have forehead ridges. - N39 25.152 W087 25.508