Got the most marks of all

[Alfredo]

Test No. express/elem-1 "Adding Up", question 2

All the sudents got high marks in the test but Mary stood out.

(a) got a lot of marks
(b) got higher marks than someone
(c) got very good marks
(d) got the most marks of all

Test No. express/elem-1 "Adding Up", answer 2

All the sudents got high marks in the test but Mary got the most marks of all.

Correct answer: (d) got the most marks of all

Your answer was: incorrect
All the sudents got high marks in the test but Mary got higher marks than someone.
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I think you need to change the distractor : got higher than someone because it is grammatically incorrect and it is confusing.

[Alan]

Thank you for your comments. The choice you mention and seem to object to is wrong and not confusing and that's why it is not the right choice.
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English as a Second Language
You can read my ESL story Head expressions for you