Which option best revises this sentence so that it uses parallel structure? transportation planner sarah reidel believes that companies need to encourage employees to take alternate means of transportation and telecommute when possible, as well as work abbreviated schedules. 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. b. transportation planner sarah reidel believes that companies need to encourage employees to take alternate means of transportation, telecommuting when possible, and working abbreviated schedules. c. transportation planner sarah reidel believes that companies need to encourage employees to take alternate means of transportation, telecommuting when possible, as well as working abbreviated schedules. d. transportation planner sarah reidel believes that companies need to encourage employees into taking alternate means of transportation, to telecommute when possible, and working abbreviated schedules.

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.

i would say the correct answer is not concrete.

from the political point of view it could be said that the candidate   is an effective speaker because she takes a strong position on the issue. it is an open discussion but probably she is making a presentation and can choose which subjects she wants to address. she is very likely to attain her aim which is to convince voters to accept her proposal.