Option A: How well do elements of the text help the text achieve its goals?
The two last options are related with the interests of the reader and not only with the text. The option B, is not exactly about the text but more about the author. The option A really intends to assesses the text.
Answer:
Very important. Each paragraph should begin with a topic sentence setting out what will be discussed. The body should contain properly structured sentences (no fragments or runons) containing supporting details—examples, explanations, or events. The concluding sentence should indicate in some way that the topic is completed or hint at the topic of the following paragraph. The writing should be concise but meaningful using well chosen words and avoiding repetition (except for rhetorical effect). Avoid bland words and cliches, and look for verbs that convey two ideas (such as paced for walked nervously) and replace it and they with the names of things.
Explanation:
https://www.quora.com/What-is-the-importance-of-the-patterns-of-written-works-toward-well-written-paragraphs
Hope this helps.
