Stochastic Volatility Models Are Said to Incorporate the "Leverage" Effect

Stochastic volatility models are said to incorporate the "leverage" effect.The presence of the leverage effect

A) Results in a left skew in the options smile because stock price drops are associated with higher firm leverage and so with increased volatility.
B) Results in a right skew in the options smile because stock price increases are associated with higher firm leverage and so with increased volatility.
C) Results in a symmetric distribution of stock returns,resulting in higher option prices both in- and out-of-the-money.
D) All option models have a leverage effect because the option is a leveraged position in stock.The stochastic volatility model exacerbates this effect.