Until 1850, the speed of signals along nerves was believed to be at least as fast as light does travel.
a) fast as light does travel
b) the speed of light
c) fast as the speed of light
d) the speed of light is
e) fast as the speed of light is

Until 1850, the speed of signals along nerves was believed to be at least as fast as light does travel.
a) fast as light does travel
b) the speed of light
c) fast as the speed of light
d) the speed of light is
e) fast as the speed of light is

C
E
C
B.
C
The answer is D.
Then answer is C
i go with C as well
C. I beleive.
bet’n C & E I will chose ‘C’
speed of x is believed to be at least as fast as speed of y
C