Computers are becoming faster, more powerful, and more reliable, and so too are modems, they are the devices to allow two or more computers to share information over regular telephone lines.
(A) so too are modems, they are the devices to allow
(B) so too are modems, the devices that allow
(C) so too modems, the devices allowing
(D) also modems, they are the devices that allow
(E) also modems, which are the devices to allow
c
b
b
c.. as it involves correct parallelism
C
because there is parallelism b/w becoming and allowing.
B
Choice B is right. The So too.. is the correct idiomatic usage. The problem with choice A is They is ambiguous whether it refers to computers or Modems. The choice C,D & E are awkward and wordy.
b is the answer
B
b
B
B
B
B
B