C$.$ As a quality lab manager in a chemical company, you were given a task to develop an analytical method to detect multiple toxic elements at a concentration level lower than ppb in their wastewater. You have enough budget to purchase any expensive instrument. However, the requirement for the method was to analyze a large number of water samples in high throughput and detect multiple elements simultaneously with high sensitivity required by the environmental regulation. Suggest what type of instrument for elemental analysis you should buy and justify your suggestion. $[10$ pt$]$