They can make you feel terrible and hinder your ability to focus on your prime objective: successfully completing your education.
A.
Money worries can make you feel terrible and enable you the ability to focus on your main objective: successfully completing your education.
B.
Money worries can make you feel terrible and distract your attention from the problems, so that you can successfully complete your education.
C.
Money worries can make you feel terrible and distract you from your main objective: successfully completing your education.