solve problems and overcome obstacles

[Halo]

Business Idiom in English, Intermediate level

ESL/EFL Test #128 "Ways of disapproving", question 8

When her father discovered that his daughter wanted to marry a pop singer, he decided to put every ......... in their way to prevent the marriage.

(a) obstacle
(b) burden
(c) impediment
(d) problem

Business Idiom in English, Intermediate level

ESL/EFL Test #128 "Ways of disapproving", answer 8

When her father discovered that his daughter wanted to marry a pop singer, he decided to put every obstacle in their way to prevent the marriage.

Correct answer: (a) obstacle

Your answer was: incorrect
When her father discovered that his daughter wanted to marry a pop singer, he decided to put every problem in their way to prevent the marriage.
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please teach me..
why "problem" isn't correct?

Halo

[nanucbe]

You 'solve' problems but have to 'overcome' obstacles.
n
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