Final answer:
The correct cell range for the command =Average(B2:C6) is C2:C6. Therefore, the correct option is 3).
Step-by-step explanation:
The correct cell range for the command =Average(B2:C6) is option 3) C2:C6.
The AVERAGE function in Excel calculates the arithmetic mean of a range of cells. In this case, the range is from C2 to C6, which includes cells C2, C3, C4, C5, and C6.
Option 1) B2:C6 is not correct because it includes both columns B and C, while the command specifies only column C. Option 2) B2:B6 only includes column B. Option 4) C2:B6 is not a valid cell range.
Therefore, the correct option is 3).