From the excerpt given above, 'fits in' as used in this passage means to feel comfortable and acceptable in a place, thus the correct option is A. An idiom is a group of words that is not taken literally, that is, their meaning can not be deduced from those of individual word. 'Fit in' as an idiom means to be comfortable with something or someone, to be in harmony with that thing.
-Pope attends a centennial exhibition and sees bicycles from Great Britain.
-Pope builds his own brand of bicycle called the Columbia bicycle.
-Pope works to make cycling popular
-Pope launches a movement to improve roads and paths for cyclist
-Bicycling becomes popular enough to influence the opening of bicycle repair shops.
That’s the kind of bug Henry was; and if we’d a had him along ’stead of our kings, he’d a fooled that town a heap worse than ourn done.”
In the article, the author - Neil de Grasse Tyson discusses parapsychology and writes that comparing it with real science is absurd because there is no way to support the sixth sense in humans. He notes that our senses are limited and scientific knowledge is needed to prove the theories. The correct answer is D.