It might Be B or D I hope on of those answer are correct.
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
Dogs need several things -- food, fresh water, exercise, and plenty of love -- from their owners each day.
Put dashes in between what dogs need from their owners.