The correct answer is B. Christianity
Explanation:
The word religion refers to a system composed of a set of beliefs, practices, organizations, texts, and others that are part of spirituality in human beings. Considering there are multiple elements related to spirituality, there are thousands of religions around the world but the main religions include Christianity, Hinduism, Buddism, Islam, around others. Additionally to this, in most countries there is one main religion or a religion that is practiced by most of the population; this religion is usually determined by the historical processes and the culture.
In the case of New Zealand, which is a country located in the southwestern of the Pacific Ocean, the Christianity is the most-practiced religion as almost half of the population (around 48%) practice Christianity through the Catholic, the Anglican or the Presbyterian church all which belong to Christianity. Also, other religions such as Hinduism, Islam or Buddhism are practiced by the population of this country but just by less than 10% of the population. Considering these ideas, it can be concluded the most-practiced religion in New Zealand is Christianity.