Answer:
B). Oftentimes, our family travels to monuments and museums.
Step-by-step explanation:
Oxymoron is a literary device that refers to a group of words that is self-contradictory. It refers to a figure of speech where two opposite ideas are intermingled to create a specific effect. In the given question, the sentence exemplifying oxymoron is option B as it displays two contrasting ideas 'often' and 'times' together in one single sentence that states that the family travels to monuments and museums 'often' and 'times' that brings two conflicting thoughts together. Thus, option B is the correct answer.