Question: Who founded the radio show that The Carter Sisters joined in 1950 ? 

Context articles: Christopher Jones (bishop)
Helen Carter
Anacaona (band)
Cranked Up Country Radio
Maybelle Carter
The Carter Sisters
Liberty Baptist Church (Grooverville, Georgia)
Carter Family discography
Grand Ole Opry
Anita Carter

Christopher "Christy" Jones (born 3 March 1936) is the Bishop emeritus of the Diocese of Elphin.
 He was born in Rathcroghan County Roscommon, Ireland the second youngest child of eleven: one brother also became a priest while three sisters joined the religious life.
Helen Myrl Carter (September 19, 1927 – June 2, 1998) was an American country music singer.
 The eldest daughter of Maybelle Carter, she performed with her mother and her younger sisters, June Carter and Anita Carter, as a member of "Mother Maybelle and the Carter Sisters", a pioneering all female country/folk music group.
 The group was also known as The Carter Family.
Anacaona is the name of an all-girl orchestra, founded in 1930s Havana by Cuchito Castro and her sisters.
 Eventually, all 11 sisters joined the band.
 The band was formed during the Machado era when the political situation led to university closings, forcing Cuchito Castro to abandon her studies and her plan to start a dental practice.
 Instead, she chose a different career in 1932 by proposing a female septet to challenge the male-dominated son music.
 At the time, it was believed women were not capable of playing son.
Cranked Up Country Radio"®" - Is a syndicated weekly 3 hour country music show radio show and 1 hour country music video show hosted by Curtis McKinney and Brad Hennington.
 The radio show is a combination of music, comedy, talk, and interviews along with the 'Advice from the Desk of Mr. Holland', the 'Cranked Up Five', 'Hick Picks', and the 'Joke of the Week'.
 The video show is a compressed version of the radio show made from video recorded while making the radio show.
 Cranked Up Country Radio is heard on over 20 FM, AM, and Digital Broadcasting stations.
"Mother" Maybelle Carter (May 10, 1909 – October 23, 1978) was an American country musician.
 She is best known as a member of the historic Carter Family act in the 1920s and 1930s and also as a member of Mother Maybelle and the Carter Sisters.
The Carter Sisters, (also known as the second version of The Carter Family) were an American singing quartet consisting of Maybelle Carter and her daughters June Carter Cash, Helen Carter, and Anita Carter.
 Formed during World War II, the group recorded and performed into the 1990s.
Liberty Baptist Church is a historic church built about 1858 in Grooverville, Georgia.
 It was added to the National Register of Historic Places on August 20, 2013.
 It is located on Liberty Church Road.
 There is a Georgia Historical Commission historical marker at the site.
 According to the marker: "In 1841 the Ocklochnee anti-Missionary Baptist Association passed a ruling to dismiss members believing in the 'new fangled institutions of the day.'"
 One of the excommunicated sisters joined with others in forming the Liberty Baptist Church.
 The church includes a slave gallery.
 Freed slaves from the area formed First Elizabeth Church in Grooverville.
This is a comprehensive discography of Carter Family, often cited as "the most influential group in country music history": (For recordings by the second generation of The Carter Family see The Carter Sisters.)
The Grand Ole Opry is a weekly country-music stage concert in Nashville, Tennessee, which was founded on November 28, 1925, by George D. Hay as a one-hour radio "barn dance" on WSM.
 Currently owned and operated by Opry Entertainment (a division of Ryman Hospitality Properties, Inc.), it is the longest-running radio broadcast in US history, albeit not the longest-running one on a radio network.
 Dedicated to honoring country music and its history, the Opry showcases a mix of famous singers and contemporary chart-toppers performing country, bluegrass, Americana, folk, gospel, and comedic performances and skits.
 It attracts hundreds of thousands of visitors from around the world and millions of radio and Internet listeners.
Ina Anita Carter (March 31, 1933 – July 29, 1999), the youngest daughter of Ezra and Mother Maybelle Carter, was a versatile American singer who experimented with several different types of music and played upright bass with her sisters Helen Carter and June Carter Cash as The Carter Sisters.
 The trio joined the "Grand Ole Opry" radio show in 1950 (Anita was 17 years old at the time), opened shows for Elvis Presley, and joined "The Johnny Cash Show" in 1971.
 As a solo artist, and with her family, Carter recorded for a number of labels including RCA Victor, Cadence, Columbia, Audiograph, United Artists, Liberty and Capitol.