Answer:
gallon
Step-by-step explanation:
A gallon is a measuring unit used to measure the liquid capacity. It helps in measuring the volume and capacity of a fluid. The capacity of one gallon is equivalent to 3.79 liters. It is used to denote the measurement of approximately four liters of liquid.
Mrs. Larivierre had filled a tub with water. To measure the water content of the tub, the most appropriate unit would be a gallon.
