Final answer:
The expected outcome of theophylline is to dilate the bronchioles, aiding in increased air flow and easier breathing for the client.
Step-by-step explanation:
Theophylline is a medication used to treat respiratory conditions such as asthma by relaxing the smooth muscles in the bronchioles. This action causes the bronchioles to dilate, which helps to increase air volume in the lungs and makes it easier for the client to breathe. Therefore, the expected outcome of this medication is to dilate bronchioles (A). Theophylline does not primarily reduce inflammation, loosen secretions, or block leukotrienes; its main function is bronchodilation.