Answer:
D
Explanation:
If these three substances are mixed together with the required proportion, it would yield concrete all the time. Thus, the result is replicable, or repeatable, in future experiments.
The result is not from an observation of the natural world because the three substances were mixed together by man in a lab.
Answer:
c.
Explanation:
Based on the information provided within the question it can be said that the best representation of this would be to accept initial offers of favors in good faith, but be ready to react to them as tricks, not favors, if they are later revealed as exploitation devices. This will make you seem grateful but at the same time remain defensive in case they try to exploit the reciprocity rule and want something in return.
