False, atomic mass is the weighted average mass of an atom of an element based on the relative natural abundance of that element's isotopes
        
                    
             
        
        
        
There are 5 steps of the scientific method 
1. Make a question
2. Do some research for that question.
3. Hypothesis ( guess what might happen during the experiment)
4. Test and Collect Data
5. Conclusion ( what you learned from the experiment)
 
        
             
        
        
        
An acronym for change would be preserve because that means keep
        
             
        
        
        
Number of types of bread for making sandwich = 2
Number of types of meat for making sandwich = 3
Number of types of cheese for making sandwich = 2
Then
Number of different sandwiches that can be made = 2 * 3* 2
                                                                                 = 12 sandwiches
From the above deduction, it can be easily concluded that the correct option among all the options that are given in the question is the first option.