Final answer:
The skills of K in 'The Seventh Man' are not detailed in the given options. However, discussing the Civil War, the Union's and Confederacy's strengths and weaknesses can be assessed, with the Union's offensive capabilities and the Confederacy's weak navy being their respective disadvantages.
Step-by-step explanation:
Description of K's Skills in 'The Seventh Man'
The character of K in 'The Seventh Man' does not explicitly demonstrate any of the skills listed in the options A to D. Therefore, the question may be referencing the wrong literature or perhaps K's skills are non-existent or not defined in the context provided. However, if the question instead refers to the American Civil War, it may be seeking an analysis of the Union's or Confederacy's capabilities, in which case the answers would be as follows:
For the Union, the strengths included a large population, substantial industry, and an extensive railroad. The Union's weakness was not the ability to fight defensively, but rather that they were more challenged when fighting offensively, as their strategic aim was to conquer and hold Confederate territory.
For the Confederacy, the strengths were the ability to wage a defensive war, shorter supply lines, and the resources of the Upper South states. The Confederacy did not have a strong navy, which was one of its significant disadvantages during the Civil War.