Final answer:
The early country pop star from the 70s/80s mentioned in the unit is Dolly Parton, known for her crossover success between country and pop music.
Step-by-step explanation:
The example given in this unit of an early country pop star from the 70s/80s is Dolly Parton. She is well known for blending country music with pop sensibilities, which brought her immense success during that period. While Garth Brooks is also a very influential figure in country music, his commercial peak came in the 1990s, and thus he does not fit the time frame of the 70s/80s mentioned in the question. Johnny Cash and Willie Nelson, though very famous in their own right as country musicians, are not typically classified as country pop artists in the context of this question.