Final answer:
Thomas A. Dorsey is considered the father of gospel music, Guglielmo Marconi is credited with the invention of the radio, and Lyndon Johnson signed the Voting Rights Act.
Step-by-step explanation:
The individual generally considered the father of gospel music is b) Thomas A. Dorsey. His contributions to the development of gospel blues shaped the genre significantly.
Meanwhile, in the field of technology, the invention of the radio is attributed to c) Guglielmo Marconi, who was an Italian inventor and is often credited with the development of the first practical wireless telegraphy system.
In terms of the history of U.S. civil rights, the Voting Rights Act was signed by a) Lyndon Johnson in 1965, which was a landmark piece of federal legislation in the United States that prohibited racial discrimination in voting.