A would be the best so that when a problem comes up and he's not there they can handle it
Answer:
The organization of paragraph 2 on page 63 (“In Boston…”) contributes to the author's main idea by
Explanation:
The answer is A, this sentence has the correct use of the present tense, while B is inconsistent with its use, C uses the past tense, and D uses progressive tense. Hope this helps
Answer:
You can increase the validity of an experiment by controlling more variables, improving measurement technique, increasing randomization to reduce sample bias, blinding the experiment, and adding control or placebo groups.
Answer: What text is it? And who is the author, I think that would let other people help answer this question including myself