Thelonious Monk, who was a jazz pianist and composer, produced a body of work both rooted in the stride-piano tradition of Willie Smith and Duke Ellington, yet in many ways he stood apart from the mainstream jazz repertory.
a) Thelonious Monk, who was a jazz pianist and composer, produced a body of work both rooted
b) Thelonious Monk, the jazz pianist and composer, produced a body of work that was rooted both
c) Jazz pianist and composer Thelonious Monk, who produced a body of work rooted
d) Jazz pianist and composer Thelonious Monk produced a body of work that was rooted
e) Jazz pianist and composer Thelonious Monk produced a body of work rooted both
OA is D. Can some one explain why B is incorrect? Aren't the commas necessary in this case?
Source: gmatprep
Thanks.
a) Thelonious Monk, who was a jazz pianist and composer, produced a body of work both rooted
b) Thelonious Monk, the jazz pianist and composer, produced a body of work that was rooted both
c) Jazz pianist and composer Thelonious Monk, who produced a body of work rooted
d) Jazz pianist and composer Thelonious Monk produced a body of work that was rooted
e) Jazz pianist and composer Thelonious Monk produced a body of work rooted both
OA is D. Can some one explain why B is incorrect? Aren't the commas necessary in this case?
Source: gmatprep
Thanks.

















