Who introduced the "blue yodel" into country music?

He seemed a likely replacement at Sun Records for Elvis Presley: _______________________

Fill in the blank(s) with correct word

The Tree of Jesse is a common motif in twelfth- and thirteenth-century art because

a) it is believed to represent the genealogy of Christ and the Virgin Mary. b) its wood was favored for the construction of cathedrals. c) Christ was said to be crucified on a Tree of Jesse. d) relics of Jesse were preserved at many pilgrimage sites.