By advancing the theory of ______, Bacon showed the new empirical attitutes toward truth about nature and bravely challenged the medieval scholasticists.

A．British people
B．Scottish people
C．all white people in Britain
D．people who are descents of English - speaking Anglo - Saxons.

A．There are few mineral resources in America.
B．Excessive explorations and large consumption have exhausted many resources that are not renewable.
C．Geographic change and Climate effect.
D．Terrorist has burnt it over.