Because good researchers rely on first hand account or better said primary evidence. The reason why they rely on primary evidence is because it is usually the most reliable. Much more so than secondary or even tertiary evidence. This enables them to understand the history of a certain topic better. 
        
             
        
        
        
It’s making sure it really do able so it can counts to others to make it
        
             
        
        
        
Answer:
The correct answer would be - option C. the time that it takes you to get to the school.
Explanation:
The dependent variable is the factor or variable in any research or experiment is the variable that depends on the independent variable which means it changes with the change in the independent variable.
Here the time the different vehicle takes to get to the school is a dependent variable as it depends on the fact that which vehicle is using and changes with the change in the type of vehicle.
 
        
             
        
        
        
Rocks are classified in groups such as sedimentary, it helps narrow the options down.<span>the groups are determined by how the rock is formed.</span>
        
             
        
        
        
Answer:
Which of the byproducts from the breaking of the bond between the last two phosphates in an ATP molecule does your body use to perform work?
 phosphate molecule
Explanation: