The step by step direction of a experiment are found in... A. The procedure
B. The conclusion
C. The hypothesis
D. Data TAble

I believe it the Data Table

Explanation:

because that the final step of an experiment; recording your data throughout the experiment, and that where you recorded your steps and information throughout the experiment.

The answer is C, hydrogen gas. This is because in single replacement reactions, the single element (here Magnesium) replaces whichever element in the compound it corresponds to. Because Mg loses electrons since it’s a metal, it will replace the element which also loses electrons, which is Hydrogen here. So when they switch places, MgCl2 and H2 are made— and H2 is the hydrogen gas.