If multiple researches obtained the same result, it means that the test is highly repeatable ! Highly repeatable results are always very welcomes, because people believe that they have a high validity and high credibility.
So the correct answer is:
<span>a) Discoveries are more credible when they are independently verified</span>
Some man-made fibres, too, are derived from naturally occurring polymers. For instance, rayon and acetate, two of the first man-made fibres ever to be produced, are made of the same cellulose polymers that make up cotton, hemp, flax, and the structural fibres of wood.
<span>-Heart failure
-Hepatic cirrhosis
-Nephrosis</span><span>
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We should stop polluting the rivers and throwing trash all over the place, and cut down less trees, since we are harming the environment for the animals and plants.
The answer is B)reproduce