Select the phrase(s) from the given three options which can be used to form a single sentence from the two sentences given below, implying the same meaning as expressed in the statement sentences. The given options may or may not be starters.
A. The art of whistling has largely fallen out of favour in modern times. 
B. It remains an intriguing skill that, when mastered, can serve as both a form of entertainment and an unconventional means of communication.
I. Although the art of..
II. Since the art of..
III. Nevertheless, it remains an..