Your interviewers are curious to what extent you've explored your options. How you answer will offer them insights into your determination and how dedicated you are to your pursuits if you weren't accepted into MCPHS University this year. Whatever your course of action, it's fine to be honest here, so long as your choice of career or degree doesn't come across as wishy-washy and non-committal. Share your plan while exhibiting your commitment, confidence, and drive to succeed.
From their Core Values; "Personal and Professional Accountability: Be mission focussed. Honor and follow through on commitments and agreements made to others. Work collaboratively as a team member. Be reflective and transparent in communications with others. Always provide your best effort in work performance. Speak up when professional or ethical standards are being violated."