Answer:
C
Explanation:
The adjectives in sentence C can be scrambled up and still make sense.
The study of the structure an behaviour of the physical and natural environment by oberseving through scientficic instruments and through experiments.
Might night fight palabras como esas preguntas?
I'd say the third sentence sounds very supportive, it supports the idea and positivity that service brings.
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.
