Which of the following statements is true of criminal attempt? A. The indispensable element test has been adopted by the federal courts and the majority of state systems. B. The Model Penal Code provides that conduct is not an attempt unless it involves a substantial step toward the commission of the offense. C. Substantial steps are preparatory steps taken toward the completion of a crime that are remote from the actual commission of the crime. D. Mere preparation to commit an offense is sufficient to support a charge of attempted criminal activity