The correct answer is - <span>Running takes discipline, and many people enjoy running. This is faulty coordination because the first sentence is somewhat the opposite of the second one - usually, when something demands a lot of discipline and hard work, people are not going to enjoy doing that. This is why the coordination between these two sentences is wrong - it should say something like 'however, many people enjoy running,' instead of 'and.' </span>
Running takes discipline, and many people enjoy running.
Explanation:
By combining independent clauses in a sentence, the writer reveals the relationships between the thoughts expressed by the clauses.
The conjunction and in the first option is an example of <em>faulty</em> coordination because you can hadly expect people to enjoy something that requires discipline. Discipline and enjoyment are hardly compatible for most people.
If we replace the coordinating conjunction and with the coordinating conjunction yet, we will have correct coordination and show the correct relationship between the thoughts expressed by the clauses:
Running takes discipline, yet many people enjoy running.
