Not Just..But Also VS Not only...But Also

[sanjoy18]

The invention of the elevator in the mid-nineteenth century was significant not only for the
convenience it represented, also it ushered in a new era in architecture, allowing buildings to become increasingly tall.
A) not only for the convenience it represented, also it ushered in a new era in architecture
B) not only for the convenience it represented; it also ushered in a new era in architecture
C) not only because it represented convenience, but also because it ushered in a new era in architecture
D) not just for the convenience it represented, but also because it ushered in a new era in architecture
E) for the convenience it represented not only in addition to ushering in a new era in architecture

Answer C What is wrong with Option D

[theCodeToGMAT]

The invention of the elevator in the mid-nineteenth century was significant not only for the convenience it represented, also it ushered in a new era in architecture, allowing buildings to become increasingly tall.
C) not only because it represented convenience, but also because it ushered in a new era in architecture
D) not just for the convenience it represented, but also because it ushered in a new era in architecture

In {D}, the idiom "not only.. but also..." is impacted; Also, blue part is not parallel..

[sanjoy18]

I don't think option D is wrong because of Not Just..But also
Not Just..But Also..is conjunction pair..and it is correct

Example. Jon Plays tennis not just for fun but also for the prize Money

What do you think?