Which of the Following Statements About the Stereochemistry of Halogenation

Which of the following statements about the stereochemistry of halogenation reactions is true?

A) The configuration at a stereogenic center of a product must change even if a reaction does not occur at a stereogenic center.
B) An achiral starting material always gives an achiral product only.
C) An achiral starting material always gives either an achiral or a racemic product.
D) An achiral starting material always gives a racemic product only.