Final answer:
Educating Elaine about the consequences of nonadherence is the most likely intervention to increase her medication adherence by empowering her with knowledge to make informed decisions regarding her health.
Step-by-step explanation:
The intervention most likely to increase Elaine's medication adherence is educating Elaine about the consequences of nonadherence. This approach involves actively engaging with Elaine to ensure she understands the importance of her medications and the potential negative outcomes if she stops taking them. Providing written information (option A) can be helpful as supplementary material, but without understanding the information's relevance, Elaine may not be motivated by it alone. Involving Elaine's family in monitoring her medication (option B) could be beneficial, but it should be done with Elaine's consent and in a manner that supports her autonomy. Threatening involuntary commitment (option C) would likely be counterproductive and damage the therapeutic relationship. Education about consequences can empower Elaine with knowledge and may lead to her making an informed decision about her health, thereby improving her adherence to the medication regimen.