c. persuade the commissioners to place street lamps along the road
The most credible source in terms of researching the effects of smoking is letter b, research article in a scientific journal. It is because a credible source means that it is valid or could be relied on in which the research article is, because it has been researched and holds validity of which contains proof. Other choices does not correspond to the question for they don't hold any validity or proof in the topic that could be reliable.
Answer:
c. Descriptive grammar seeks to describe how language is actually used in the real world.
Explanation:
When we talk about descriptive grammar, we refer to a language's structure, its rules and the way these are implemented in everyday life by many speakers, including its many varieties, whether standard or nonstandard. On the other hand, prescriptive grammar makes reference to the use of language and its grammar rules, separating "good grammar" from "bad grammar", syntactically speaking.
