In Texas, a non-compete provision in an employment contract would most likely be enforceable if it says,
A. "In consideration for this offer of employment, employee agrees that upon leaving this job he will not engage in any business in competition with employer within a 50-mile radius for a period of 2 years."
B. "In consideration for training provided in XYZ Software and access to customer data files, employee agrees that upon leaving this job he will not engage in any business in competition with employer within a 500-mile radius for a period of 10 years."
C. "In consideration for training provided in XYZ Software and access to customer data files, employee agrees that upon leaving this job he will not engage in any business in competition with employer within a 50-mile radius for a period of 2 years."
D. All of the above would be enforceable.
E. None of the above.