To investigate a possible relationship between two factors, such as acidity and solubility, you must first identify the variables involved in the experiment. Identify the independent variable, the dependent variable, and any possible confounding variables within this experiment.

                              Your answer is letter A and letter B

A) The Code of Hammurabi

B) Irrigation Canals

Explanation:

The code of Hammurabi is a code that the Mesopotamian civilization had regarding moral and social laws, it dates from the 1754 BC and it´s one of the oldest deciphered writings from old times, it is also one of the largest writings that have been discovered from old civilizations.

The irrigation canals in ancient Mesopotamia were a series of canals and dams that were used to transport water to different lands in order to be able to grow crops, their use was mainly agricultural.