The table gives the conditions in four test-tubes, each containing equal amounts of starch and salivary amylase. In which test-tube is the starch broken down most quickly?
- ApH 2, temperature 27 $^{\circ}\text{C}$
- BpH 2, temperature 37 $^{\circ}\text{C}$
- CpH 7, temperature 27 $^{\circ}\text{C}$
- DpH 7, temperature 37 $^{\circ}\text{C}$