Kelsey had a CT scan that showed a tumor in the right frontal cortex. Which of the
following behavioral symptoms most likely prompted the scan to take place?

1. difficulty comprehending language
2. difficulty producing language
3. motor skill deficits in the left side of her body
4. sensory deficits in the right side of her body

Given that the tumor is located in the right frontal cortex, the most likely behavioral symptom prompting the scan would be difficulty producing language (option 2). The right frontal cortex is involved in higher cognitive functions, including aspects of language production, attention, and executive functions.

Additionally, as this area of the brain is linked to motor control, Kelsey may also exhibit motor skill deficits on the left side of her body, which is controlled by the right hemisphere of the brain. However, considering the nature of the question, the focus on language production makes option 2 the most probable reason for the CT scan.