Question

what is illustrated by cornelius vanderbilts net worth?
how a large enterprise can be run with little funding
how even wealthy magnates can fail and die poor
the extremely lucrative nature of 1800s railroads

Explanation:

Cornelius Vanderbilt was a major railroad magnate in the 1800s. His significant net worth was built through railroads, showing their lucrative nature. The first option is incorrect as large enterprises like his needed substantial funding. The second is wrong as he died wealthy. The third option aligns with his success in 1800s railroads creating great wealth.

Answer:

the extremely lucrative nature of 1800s railroads (the third option)