Theravada Buddhism is known as a "spartan" form of Buddhism because,
Select one:
O a. it argues that all we have for reaching Nirvana is the Three Jewels
O b. All of these answers are correct
O c. it argues that there are many Bodhisattvas here to help us reach Nirvana
O d. it argues that very few people will ever reach Nirvana
O e. it teaches that very little is required to achieve Nirvana