What is the correct sequence of steps for the concrete slump test?
A. Filling the mold with the 3rd and last layer
B. Operator position
C. Filling the mold with the 1st layer
D. Filling the mold with the 2nd layer
E. Finishing and cleaning
F. Cone settling test
G. Mold lifting
H. Measurement of the slump
I. The test must be performed with at least 30 liters of concrete.
II. The first layer must be compacted with 25 rod hits.
III. The cone must be filled up to 2/3 of its volume.
IV. The test must be performed on a horizontal, firm, and vibration-free surface.
V. The entire filling and lifting operation should not take more than 3 minutes.
a) B, C, D, A, E, F, G, H
b) A, B, D, C, E, F, G, H
c) C, D, A, E, B, G, F, H
d) B, C, D, A, E, G, F, H