Restrictive covenants in employment contracts

a$.$ Are usually set up to benefit the employees rather than the employers

b$.$ Are never closely scrutinized by the courts because they simply allow businesses to protect their trade secrets

c$.$ Would be unenforceable if the employer prevents the employee from working anywhere for a lengthy period of time after dismissal or resignation

d$.$ Are usually enforced by the courts because most employees are fully capable of looking after themselves in contract negotiations with employers