To determine the best event that would complete the timeline, we should consider the context and chronological order of the events already listed. The events are significant American technological and infrastructural advancements.
- The last event listed is from 1876 when Alexander Graham Bell patents the telephone.
- The options given are spread out in different years, but we need to look for an event that fits well within the timeline and continues the theme of innovation or significant milestones.
A. 1876 - Colorado admitted to the Union
B. 1886 - Geronimo surrenders to U.S. authorities
C. 1895 - H.G. Wells publishes The Time Machine
D. 1879 - Thomas Edison invents the incandescent light bulb
Considering the options, D (1879, Thomas Edison invents the incandescent light bulb) is the most relevant and significant technological advancement directly following the invention of the telephone. It continues the trend of major inventions in the timeline and falls chronologically just a few years later.
Thus, the best option to complete the timeline is:
D. 1879 Thomas Edison invents the incandescent light bulb.