While Ethiopian Abebe Bikila is best known for his running accomplishments, as both the most famous barefoot Olympic champion and the first athlete to defend an Olympic marathon title, also serving in the Ethiopian military in an elite infantry division tasked with protecting the emperor.
Structure to follow - While Ethiopian is best known for his running accomplishments as both A & B, he C...
contrast to show while after comma
A. and the first athlete to defend an Olympic marathon title, also serving
While Ethiopian is best known..., also serving -> contrast is missing
B. and the first athlete to defend an Olympic marathon title, he also served
While Ethiopian is best known for his running accomplishments , he also served..
as both the most famous... and the first athlete
C. and as the first athlete to defend an Olympic marathon title, he also served
As Both the most famous...and as the first athlete - not parallel
D. and as the first athlete to defend an Olympic marathon title, also serving
As Both the most famous...and as the first athlete - not parallel
E. as well as the first athlete to defend an Olympic marathon title, he had also served
As Both the most famous...as well as the first athlete - need and as connector for both
B is the answer!