Final answer:
The possible last digits of the dimensions if the side lengths are whole numbers are 7 and 9.
Step-by-step explanation:
In this question, we are asked to determine the possible last digits of the dimensions if the side lengths are whole numbers. Based on the given options, the possible last digits are 1, 3, 2, 5, 4, 6, 7, and 9. These digits are significant and can be observed in the examples provided. Therefore, the correct answer is option d, 7 and 9.