Final answer:
The term that represents a fusion of rock and hillbilly was first printed in a trade journal in 1955, marking the rise of a new music genre known as rock and roll. The correct option is b.
Step-by-step explanation:
The term that suggests a hybrid of rock and hillbilly, often associated with the early days of rock and roll, was first printed in a trade journal in the year 1955. This term was indicative of a new genre that combined elements of rock music with the rustic musical styles of the Appalachian region, commonly referred to as hillbilly music at the time.
Contrary to all the years listed, 1955 signifies the era when icons such as Bill Haley and His Comets and Chuck Berry were making a significant impact on the music scene and shaping the sound that would captivate the youth of the day.
Hence, Option b is correct.