Final answer:
Turn of the century revivals were experienced in many countries, notably in Australia and Wales, and there were also religious revival movements in the late 1970s and early 1980s in the United States.
Step-by-step explanation:
The occurrence of revival as the twentieth century approached can be best described by option c) Turn of the century revivals were experienced in many countries, notably in Australia and Wales.
The Second Great Awakening, which was a religious revival movement between 1820 and 1860, saw evangelical Christianity spread and replace the established religious patterns of the colonial and Revolutionary eras. This movement gained influence and had the greatest number of converts in religious revivals in the United States.
Additionally, in the late 1970s and early 1980s, there was a period of religious revivalism in the United States, similar to the Great Awakening of the early eighteenth-century, where charismatic religious leaders became national celebrities and attracted numerous followers through religious television programs.