Question

Haiti faced all of the following problems, except

Answer 1

Haiti faced all of the following problems, except an "b. overabundance of foreign investment," since a great deal of foreign investment would have helped Haiti improve its infrastructure and many other things. 

Answer 2

B (but why are they out of order?)
"overabundance" means "too much" or "more than necessary"
Haiti does NOT have too much foreign investment : the opposite is true,
in that Haiti has trouble attracting foreign companies and investments,
for several reasons.