What is the best way to rephrase: "Breathing deeply _____ if you feel stressed"?

The phrase "Breathing deeply _____ if you feel stressed" suggests a recommendation or guidance for someone looking to alleviate stress. The correct answer fits this framework by using the word "should," which conveys a strong suggestion or advice that deeply breathing is a recommended practice for calming oneself.

Using "should" indicates that the action of breathing deeply is not just a possibility but a suggested course of action that is likely to yield positive results in reducing stress. This aligns with the intent of encouraging someone to adopt a particular behavior to manage their stress levels effectively.

Other options, while they may convey some form of potential benefit from deep breathing, do not carry the same level of recommendation or urgency. For instance, "may" and "could" imply possibility rather than a strong suggestion, while "will" reflects certainty, which is not suitable in the context of giving general advice about managing stress, as individual experiences may vary. Thus, the use of "should" is the most appropriate choice to convey that breathing deeply is a recommended practice for those feeling stressed.