When there is an increase in pressure in liquids, the viscosity will generally increase. Here's why: Viscosity is a measure of a liquid's resistance to flow, primarily due to the intermolecular forces between its molecules. When pressure increases, the molecules in a liquid are forced closer together. This closer proximity leads to stronger intermolecular forces and increased resistance to the relative motion of the liquid layers. Consequently, the liquid becomes more difficult to flow, meaning its viscosity increases. The final answer is $\boxed{\text{A}}$. That's 2 down. 3 left today — send the next one.