What did Olmstead, Otis, Sullivan, and Roebling have in common?

A.
They were all landscape architects.

B.
Their ideas changed the way modern governments function.

C.
Their contributions and innovations made modern cities possible.

D.
They all built industrial empires as business tycoons.

Question

What did Olmstead, Otis, Sullivan, and Roebling have in common?	
 
 A.
They were all landscape architects.
 
 B.
Their ideas changed the way modern governments function.
 
 C.
Their contributions and innovations made modern cities possible.
 
 D.
They all built industrial empires as business tycoons.

nurali · Answer

i think Their contributions and innovations made modern cities possible.