The statement that is most likely to be true about mining booms is: Property values tend to increase in the short term.
During mining booms, increased demand for housing and services can drive up property values as more people move to the area for jobs. Additionally, the other statements may not hold true universally; typically, unemployment rates decrease during a mining boom due to job creation, the population may grow in the short term due to migration but not necessarily in the long term after the boom ends, and economic growth can be more variable depending on market conditions and the sustainability of the boom.