When hand-tracing the given code, which variables should primarily be evaluated?

In the context of hand-tracing code, especially when analyzing loops or mathematical computations, it's essential to focus on variables that are critical to the operation and outcome of the code being evaluated. In this case, focusing on the variables i and sum makes sense because:

• The variable i often serves as a loop counter or an iterator. Its value typically influences how many times a loop runs or which elements are processed, making it crucial for controlling the flow of execution.
• The variable sum likely holds an accumulated value, which is often the result of operations involving i and may represent a final output or key result of the code. This variable is critical in understanding what the program is computing overall.

Identifying just the right variables to evaluate allows one to comprehend the logic of the code more effectively. The other options might include unnecessary variables that do not directly impact the flow or outcome, making them less significant when tracing through the code. Thus, focusing on i and sum provides the most relevant insights into how the program functions.