Final answer:
The client demonstrates an understanding of methotrexate therapy for RA when they state that they will avoid taking any other medications with methotrexate.
Step-by-step explanation:
A nurse teaching a client about methotrexate therapy for RA should ensure that the client understands the key points related to methotrexate usage.
The correct statement that indicates understanding of the teaching is option A: "I will avoid taking any other medications with methotrexate.
" This statement is accurate because methotrexate can interact with other medications, particularly those that can potentially cause liver damage or affect renal function