The conclusion that is most likely to be supported by the data provided in the given table would be:
C). Acquiring a job in the postal service may be difficult in the future.
The data provided in the given table displays that obtaining a job in the postal department could be tough in the future.
The description of the facts(data) regarding the constant decline in the rate of employment in the postal sector year by year and even in -ve.
This reduction suggests that in the future, the losses in this sector may rise further, and therefore, it would be challenging to build a career in this field.