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.
Over the past three decades, evidence has accumulated that even low levels of lead can slow a child's development and cause learning and behavior problems.
True
Answer: just do research and say why bankruptcy is major and ways to stop it before it happends
The correct answer is emotional or behavioral disorder
Explanation: Symptoms of an emotional behavioral disorder include: Improper actions or emotions under normal circumstances; Learning difficulties that are not caused by another health factor; Difficulty with interpersonal relationships, including relationships with teachers and colleagues
