Final answer:
The correct answer is option a. Brenda Aarons is upset at her brother's behavior because he spilled his juice at the breakfast table.
Step-by-step explanation:
Brenda Aarons is upset at her brother's behavior at the breakfast table because he spilled his juice. This is behavior that is considered unacceptable during a meal, as it creates a mess and can be potentially wasteful. Brenda may also be upset because the spilled juice could have stained or damaged the tablecloth or other objects on the table.
An example of why Brenda might find this behavior inappropriate is when a student spills their juice at the breakfast table, it can lead to a sticky mess that is difficult to clean up. This can be frustrating for the person responsible for cleaning and can also disrupt the meal and create a negative atmosphere.
Therefore, option A) He spilled his juice is the correct answer as to why Brenda Aarons is upset with her brother's behavior at the breakfast table.