Conservationists have had a perpetual conflict with the government of the United States over the fast and rampant depletion of the earth's natural resources. They argue that the United States must reduce its consumption level significantly to rectify this problem. Which of the following, if true, would most strengthen the conservationists' argument?
选项：

A:There are several countries that have more requirements for resources than the United States.
B:The United States has been conserving forests for several years.
C:The United States accounts for one-third of the total world resource consumption.
D:Most countries have not taken any measures to reduce their consumption levels of natural resources.
E:New resource deposits are constantly being discovered.