When will a purchaser of goods NOT be considered a 'consumer' under the Australian Consumer Law?

Question $1$Select one:

a$.$

If they purchase a truck valued at more than $$40,000.$

b$.$

If they purchase goods valued at less than $$40,000$ for use in the course of a small business.

c$.$

If they purchase goods for personal or domestic use valued at more than $$40,000.$

d$.$

If they purchase goods valued at less than $$40,000.$