Who was eligible to receive the Medal 'For the Tapping of the Subsoil and Expansion of the Petrochemical Complex of Western Siberia'?

A. Only employees of scientific, research, or design organizations
B. Active members in the underground exploration and development of the oil and gas complex of Western Siberia, as well as employees of various supporting organizations and institutions
C. Only employees of the oil and gas industries
D. Only Party, Soviet, trade union, or Komsomol leaders
Answer: 