Which one of the following statements about economic sectors of employment is true? (1) The primary economic sector is concerned solely with primary school education. (2) A relatively low percentage of people in developed countries work in the primary sector. (3) The secondary economic sector is primarily concerned with agricultural activities. (4) The tertiary economic sector is found exclusively in developing countries. (5) Services contribute hugely to the GDP in most developing countries.

Which one of the following statements about economic sectors of employment is true?
(1) The primary economic sector is concerned solely with primary school education.
(2) A relatively low percentage of people in developed countries work in the primary
sector.
(3) The secondary economic sector is primarily concerned with agricultural activities.
(4) The tertiary economic sector is found exclusively in developing countries.
(5) Services contribute hugely to the GDP in most developing countries.