Which of the following matters is left uncertain in the article? A
how the nature of Christmas celebrations has changed over the centuries
B
why Christmas was declared a federal holiday in the United States
C
why the celebration of Christmas has been inconsistent over the years in Europe and America
D
how certain works of literature have affected the Christmas holiday

answer: b) bubbling its way

explanation: an adjective is a word or a group of words that modifies a noun (name, thing, place,

in this case, the first option "to heartily enjoy" isn't describing or modifying any noun, the third option "hiking along merrily" is describing an action but it doesn't modify any noun, the last option "beside us" is just a preposition that indicates position, so the correct answer is the second one: "bubbling its way" because it is modifying the noun "stream".