The proper way to write the sentence would be "However, no one believed rumors about the Komodo dragon either." Since commas are used after words like "first, second, third, then, finally, however, but..." there would only be 1 comma in this sentence.
I hope this helps!!
The correct answer should b <span>The melting ice will lead to the extinction of the polar bear as a species.
While the bears certainly are in trouble, there are many papers that show that they will not just go extinct. There are many areas where the warming has actually led to a replacement of ice, from a multilayered thick one to a smaller one where the seals are found more and more. Bears in this area thrive and are better than ever. The number of bears is pretty high and they mostly adapt to the situation so their extinction is not a certainty.</span>
