1. Flammable materials, like alcohol , should never be dispensed or used near an open door. an open flame another student. 11

## Step 1<br />The problem is a multiple-choice question that tests the understanding of safety precautions when handling flammable materials. The options provided are: an open door, an open flame, and another student.<br />## Step 2<br />Flammable materials, such as alcohol, can easily catch fire and cause severe damage. Therefore, it is crucial to avoid using them near any source of ignition.<br />## Step 3<br />Among the options provided, an open flame is the most likely source of ignition. An open door or another student does not pose a direct risk of ignition.<br />## Step 4<br />Therefore, the correct answer is "an open flame".