There is a huge pile of information about tire sizing around the internet. I'll attempt to summarize its application here.
Tires have 3 numbers, which work together to describe the tire's size. The first number is the section width, the second number is the sidewall ratio and the third number is the rim diameter.
The section width is the width of the tire in millimeters at the largest point. This is important when trying to fit a tire to a rim, but in your case the rim is already matched to the tire so we're good. The number does still matter for us because of what we're calculating.
Sidewall Aspect Ratio
This is the distance from the rim to the tread. It is described as a percentage of the section width, so a 70% sidewall with a 130 section width will be taller than a 70% sidewall with a 110 section width.
This is the most obvious of the numbers. It is the rim diameter in inches. Why is the section width in millimeters and the rim diameter in inches? My guess is the same reason many manufactured parts in America are dimensioned in inches, but sometimes they hang out alongside parts manufactured to metric dimensions.
We can use these numbers to (roughly) calculate tire diameter...
Let's start with a standard factory sized '97 Accord tire (yours may vary depending on trim, but it will probably have a similar outer diameter):
185 / 25.4 = 7.283" (Metric to inch conversion)
7.283 * 0.65 = 4.734 (Sidewall height as a percentage of section width)
4.734 * 2 = 9.468 (Double the radius to get diameter)
9.468 + 15 = 24.468 (Sidewalls + rim = outer diameter)
So following the same calculation:
115/70/14 = 20.339
135/80/15 = 23.504
125/70/15 = 21.890
125/70/14 = 20.890
It looks like your other 3 options are between your original spare and your standard tire diameter. As long as they'll fit in the spare tire well any one of them would likely be an adequate spare as long as the bolt pattern matches. I would favor something as close to the standard tire as possible if you know it will fit the tire well.
Please see this link at the Tire Rack for a more detailed explanation of tire sizing.
There is a calculator for tire diameter here.