Directions: The under given sentence has been divided into four parts, one of which may contain an error. No sentence contains more than one error. If the sentence contains an error, select the underlined part that must be changed to make the sentence correct. If the sentence is correct, select choice 5 as the answer.

As long as we depend for our (1) existence mainly upon non-renewable underground resources, our functions will of course (2) run the risk of getting paralyzed; our activities will (3) come to a halt, when the resources (4) run down. (5) No error