The correct answer is A. Feet
Explanation:
Scientific notation is a system that allows converting numbers with many digits into shorter mathematical expressions. Due to this, scientific notation is required in calculations with numbers with many digits. Moreover, this might occur if the unit of measurement used is too small or large for the situation. For example, if the weight of whales is measure in milligrams, which is a small unit, it is likely the result is a very long number and scientific notation is required.
In this context, the ideal unit for Matsu is feet because this unit is appropriate to measure medium distances. Therefore, this is ideal to measure a vegetable garden without getting long numbers and using scientific notation. Also, this differs from inches because inches are used to measure small distances or lengths, and cups and tons are not length units.