Table 1 would be best for her investigation. Hence the correct option is c.
Table 1 would be the most suitable for the student's investigation. In scientific experiments, it is essential to organize and present data in a clear and systematic manner. Table 1 typically includes columns for the independent variable (changing mass in this case), the dependent variable (amount of thermal energy), and any other relevant information, such as units of measurement.
This structure allows the student to record and analyze data in an organized way, facilitating the identification of patterns or trends related to how the changing mass of the substance affects its thermal energy. Choosing the appropriate data table is crucial for the success and accuracy of the experiment, and Table 1 aligns with the standard format for such investigations. Hence the correct option is c.