What are the common methods of consuming cannabis?

Inhalation, ingestion, topical application, and vaporizing are all recognized methods for consuming cannabis, making this the correct choice.

Inhalation refers to the process of taking in smoke or vapor from burning or heated cannabis, which allows for quick absorption and effects. Ingestion encompasses consuming cannabis-infused foods or beverages, which results in a slower onset of effects and potentially stronger impacts due to the way cannabinoids are metabolized. Topical application involves applying cannabis-infused products directly to the skin, which is beneficial for localized pain relief without psychoactive effects. Vaporizing is a method that heats cannabis to a temperature that releases cannabinoids in vapor form, providing a healthier alternative to smoking.

The other options, while they mention valid consumption methods, either include methods not commonly associated with cannabis or do not provide the comprehensive understanding that option C provides. For example, injection is not a standard method of cannabis consumption, as cannabis is typically not administered this way. Other options like smoking are valid but do not capture the variety of modern methods, particularly vaporizing, which has gained popularity as a distinct and healthier alternative.