Which of the following rules should be followed when collecting a stool sample for c. difficile testing? 1) stool sample should be freshly passed within 1-2 hours 2) 10-20rnl. of formed stool should be collected 3) stool should be passed into a clean, dry container 4) specimens should be obtained before antimicrobial agents have been administered a. 1,2 b. 2,3 c. 1,3 d. 1,4