Which of the following statements is not true? a. a concerto grosso normally involves two to four soloists, and anywhere from eight to twenty or more musicians for the tutti. b. a concerto grosso presents a contrast of texture between the tutti and the soloists, who assert their individuality and appeal for attention through brilliant and fanciful melodic lines. c. a concerto grosso normally involves a large group of soloists accompanied by an equal number of supporting players. d. the first and last movements of concerti grossi are often in ritornello form, a form that features the alternation between tutti and solo sections.