Bophia wants to study 6conomics tonight and also to vhit her friend Willam. She thinks hard about how to allocate the evening betprean studying and visiting William and docides to spond the first 5 hours studying and then spend 1 hour visiting William. How would an economist describe Sophia's decision? Sophia's decision is an example of __ A. maximizing marginal benefit B. good time management C. making a cholco at the margin D. minimizing marginal cost

## Step 1<br />The problem presents a situation where Sophia has to make a decision between studying and visiting her friend William. She decides to spend the first 5 hours studying and then spend 1 hour visiting William. This decision is an example of making a choice at the margin.<br /><br />## Step 2<br />In economics, the concept of making a choice at the margin refers to the decision-making process where an individual or entity chooses between different options based on the additional benefits and costs of each option. In this case, Sophia is choosing to study for 5 hours and then visit William for 1 hour, which is a decision made at the margin.<br /><br />## Step 3<br />The other options, such as maximizing marginal benefit, good time management, and minimizing marginal cost, do not accurately describe Sophia's decision. Maximizing marginal benefit would mean Sophia is choosing the option that provides the highest additional benefit, which is not the case here. Good time management would mean Sophia is managing her time effectively, but this does not necessarily mean she is making a choice at the margin. Minimizing marginal cost would mean Sophia is choosing the option that costs the least, which is also not the case here.