Mattel wanted to determine if a new toy would appeal to preschoolers, so it put six 4-year-olds in a room with several toys and waited to see which ones they played with. what form of research is this?

answer; ///product strategy;

answer: b. false

the staff is a set of five horizontal lines and four spaces which represent a different musical pitch. the lines and the spaces are numbered from bottom to top, the bottom line is the first line and the fifth line is the line on the top. the notes on the top of the staff (fifth line) have a higher pitch than a note at the bottom of the staff.