We can see that the research question that is most effective is: D. What are fossil fuels?
<h3>What is research question?</h3>
Research question is actually known to be a question which is asked by a researcher which forms the basis for his evaluation, examination, and experimentation. Every good research question must be clear and focused.
We see that the selected answer is actually clear and focused and covers other aspect of the research.
Learn more about research on brainly.com/question/6947486
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The clause <em>if you ask her </em>is an adverb clause. 
Since similarly to adverbs, these clauses answers some questions such as where, when, or in this case, under what condition, then this means that they are called adverbial clauses.
        
                    
             
        
        
        
Answer:
The Narrator didn't believe Herbert at first because Herbert appeared to be very poor, and he thought he was not going to make any money off him.
Explanation:
The Foster Portfolio is about an investment broker who was called by Herbert Foster to look at his portfolio and manage it.
He went to Herbert's house for that purpose but was initially disappointed with the general lack of affluence of the household and its occupants. 
According to the narrator "my business is handling other people’s money, and I have a great respect for money" and that he is "a salesman of good advice for rich people", so he couldn't see how he could help a man who appeared to be neither rich nor to have any money to speak of.
That was why he didn't beleive Herbert was in ned of his services. 
 
        
             
        
        
        
Answer:
Kakis Ksiąźek et toi et tu te dis ça va pas te parler de moi je te laisse le choix et tu me 
Explanation:
 
        
             
        
        
        
Answer:
B
Explanation:
I took the test. have a lovely day! :)