A model thermometer is made from a flask containing coloured water and a stopper through which a glass tube is fitted, as illustrated. The model thermometer may be altered in one of two ways. • The flask may be swapped for a bigger one filled with coloured water. • The glass tube may be swapped for another tube with a wider internal diameter. Which statement is correct?
- AOnly using a larger flask increases the sensitivity.
- BOnly using a wider tube increases the sensitivity.
- CUsing a larger flask increases the sensitivity and using a wider tube increases the sensitivity.
- DNeither using a larger flask nor using a wider tube increases the sensitivity.