in thE pArAgrAph thAt Follows this pAssAgE, wE mAy ExpECt thE Author to DisCuss ______.
A．unForEsEEn DisCovEriEs
B．philosophy
C．thE vAluE oF purE rEsEArCh
D．thE vAluE oF tEChniCAl rEsEArCh