Not only speech enables man to handle and pass on more complicated id

Not only speech enables man to handle and pass on more complicated ideas, it also enables him to accumulate them.
a)Not only speech enables man to handle and pass on
b)Not only does speech enable man to handle and pass on
c)Not only is speech enabling man to handle and pass on
d)Not only speech enables man to handle and pass off
e)Not only speech enables a man to handle and pass on