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