Thank you for going to so much trouble to find what I was looking for.
A.
n. problems that make something difficult, spoil one’s plans, make one worry, etc.
B.
n. used when saying what is bad about a person or situation or what causes problems
C.
n. an amount of effort and time that is needed to do something.
D.
n. a health-related problem
E.
v. to make one feel worried or upset