5 The test is a sequence of timed trials requiring you to progress along a predetermined path from task to task continuously. This test was developed to allow fire departments to obtain pools of trainable candidates who are physically able to perform essential job tasks at fire scenes. This is a pass/fail test based on a validated maximum total time of 10 minutes and 20 seconds. In these events, you wear a 50-pound vest to simulate the weight of self-contained breathing apparatus and firefighter protective clothing. An additional 25 pounds, using two 12.5 pound weights that simulate a high-rise pack (hose bundle), is added to your shoulders for the stair-climb event. Throughout the test, candidates must wear long pants, a hard hat with chin strap, work gloves and footwear with no open heel or toe. Watches and loose or restrictive jewelry are not permitted.
What is the meaning of the word pools as it is used in this sentence from the document?
A) contributions
B) games
C) groups
D) swimming