What is the standard of review in drug cases where the evidence relies mainly on circumstantial evidence?

"The standard of review is the same in cases in which the People rely mainly on circumstantial evidence. [Citation.] `Although it is the duty of the jury to acquit a defendant if it finds that circumstantial evidence is susceptible of two interpretations, one of which suggests guilt and the other innocence [citations], it is the jury, not the appellate court which must be convinced of the defendant's guilt beyond a reasonable doubt. "`If the circumstances reasonable justify the trier of fact's findings, the opinion of the reviewing court that the circumstances might also reasonably be reconciled with a contrary finding does not warrant a reversal of the judgment.'" [Citations.]' [Citation.] `"Circumstantial evidence may be sufficient to connect a defendant with the crime and to prove his guilt beyond a reasonable doubt."' [Citations.]" (People v. Stanley (1995) 10 Cal.4th 764, 792-793.)

B. Drug Charges

1. Legal Principles