What system of measurement is primarily used in agricultural mechanics laboratories? apprentice metric English or U.S customary German

## Step 1<br />The question is asking about the system of measurement that is primarily used in agricultural mechanics laboratories. The options provided are: apprentice, metric, English or U.S customary, and German.<br /><br />## Step 2<br />The term "apprentice" is not a system of measurement, so it can be eliminated.<br /><br />## Step 3<br />The metric system is a decimal-based system of measurement that is used worldwide. It is the most widely used system of measurement in scientific research and is also commonly used in agricultural mechanics laboratories.<br /><br />## Step 4<br />The English or U.S customary system is primarily used in the United States, and the German system is used in Germany. However, these systems are not as universally accepted or used as the metric system.