Jupiter is significantly larger than Mercury. In reality, Jupiter is about 40 times the diameter of Mercury. Therefore, if the scale is accurate, Jupiter will be much larger than Mercury, approximately 40 times the size in diameter.
However, among the options given, the closest comparison for the size of Jupiter to Mercury would indicate that it is much larger, but none of the provided options accurately reflect the correct ratio.
If we were to select from the options, "It will be ten times the size" is the most reasonable, but it's important to note that the actual size difference is much greater.