The common noun here is "frog" as the only other noun, Many, is not a common noun - it's a proper noun.
"frog" here is the object of the sentence: it's the object of the verb "caught" of which the subject is Mary
Because if we continue this we might be Dane
39.39 x 5 = 196.95 inches are in 5 meters
The natural world and its phenomenon
The correct answer is A. It starts with very specific details, devoid of any emotional interfering on the narrator's part. The only subjective detail in this line is the estimation "very strange". Still, it doesn't disturb the factuality of the context, which is firmly rooted in precise time and place references.
