The one you have selected is the correct answer.
A. Transportation planner Sarah Reidel believes that companies need to encourage employees to take alternate means of transportation, telecommute when possible, and work abbreviated schedules.
Parallel structure is when there is a consistent use of the same grammatical structure. This is especially important when writing a list. In the sentence, the author lists the three things companies can do to help with the transportation problem. The verb structure needs to be the same. Option A is the only choice that has a similar verb structure for encourage, telecommute and work. Other options vary the verb structure sometimes using verbs that end in -ing while others do not. These do not have parallel structure.
Participles come in two varieties: past and present. They are two of the five forms or principal parts<span> that every </span>verb has. They tell the time of when something happened. <span>Participles have three functions in sentences. They can be components of multipart verbs, or they can function as </span>adjectives<span> or </span>nouns<span>.</span>
I would go with D, but tell me if I'm wrong or not
good luck xx
Answer: Stories create worlds in which we live and which we pass on to others.
