Lucas can exclude from his gross income wages of $87,000.
Usually, a United State's citizen living and working abroad is taxed on his worldwide Income.
The maximum amount of exclusion of foreign earned income for Singles in 2019 is $105, 900.
Here, he is a single taxpayer who worked in Denmark for MNC Corp for the whole of 2019 and earned the salary of $87000.
He's eligible to exclude the amount of $105,900 from his gross income. and his salary is less than maximum limit allowed for exclusion, therefore, the gross income will be excluded.
In conclusion, the Option B is correct because can exclude from his gross income wages of $87,000.
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