Question:
Who was the chair of Delta Air Lines in May, 1948?

Context:
 Charles H. Dolson is the chair of Delta Air Lines from Jan, 1970 to Jan, 1971. 
 Collett E. Woolman is the chair of Delta Air Lines from Jan, 1965 to Jan, 1966. 
 Daniel Carp is the chair of Delta Air Lines from Jan, 2007 to Jan, 2016. 
 Clarence Faulk is the chair of Delta Air Lines from Jan, 1945 to Jan, 1951. 
 Gerald Grinstein is the chair of Delta Air Lines from Jan, 1997 to Jan, 1999. 
 Frank Blake is the chair of Delta Air Lines from Jan, 2016 to Dec, 2022. 
 David C. Garrett, Jr. is the chair of Delta Air Lines from Jan, 1983 to Jan, 1987. 
 W.T. Beebe is the chair of Delta Air Lines from Jan, 1971 to Jan, 1983. 
 Carleton Putnam is the chair of Delta Air Lines from Jan, 1953 to Jan, 1955. 
 Ronald W. Allen is the chair of Delta Air Lines from Jan, 1987 to Jan, 1997. 
 Leo Mullin is the chair of Delta Air Lines from Jan, 1999 to Jan, 2004.

Answer:
Clarence Faulk