A business person is charged with embezzlement and at trial he is denied the opportunity to introduce evidence that his employer told him to handle funds in a certain way. This might be deemed unfair and a violation of which of the following?

a) procedural due process under the 4th Amendment

b)substantive due process under the 5th Amendmen

c)substantive due process under the 4th Amendment

d) procedural due process under the 5th Amendment