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.
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Answer:
c. get the respondent to answer a question more fully.
Explanation:
A probe is applied to promote conversation without affecting the answer. It is especially appropriate for open-ended questions. Probes are utilized more commonly in open-ended questions than in closed-ended ones. The basic function of a probe is to provide the respondent to answer the questions completely.
