In which decade with the first transatlantic radio broadcast occur?

Answer: Option D

Guglielmo Marconi achieved the first transatlantic radio transmission on December 12, 1901.

The signal—Morse code for the letter “S”—was sent from Poldhu, Cornwall (England) and received at St. John’s, Newfoundland (Canada).

This historic event firmly places the first transatlantic radio broadcast in the 1900s, not the 1850s–1870s when radio technology had not yet matured.