Which of the following options is a potential effect of prolonged marijuana use?

Prolonged marijuana use can lead to various physiological and psychological effects, one of which is infertility. Research indicates that chronic use of marijuana can interfere with reproductive hormones, potentially leading to decreased fertility in both men and women. In men, marijuana can affect testosterone levels and sperm production, while in women, it can disrupt menstrual cycles and ovulation.

The other options do not align with the known effects of prolonged marijuana use. For instance, increased energy and heightened cognitive ability are not commonly associated with long-term use; instead, users often report lethargy or cognitive impairments. Improved social skills is also unlikely, as prolonged use can lead to social withdrawal and diminished interpersonal interactions rather than enhancement. Thus, the potential for infertility stands out as a significant and well-documented consequence of prolonged marijuana use.