Answer:
A. muss ich die Einkommenssteuer bezahlen
Step-by-step explanation:
It means: "If I get a job, I have to pay the income tax." That's true because, once you have a job, you start getting a salary or wages, which is your personal income, and, therefore, you need to pay the income tax.
Option B is about the property tax, and option D is about the value-added tax. These taxes are not applicable in the situation in question.
Opton C says 'you don't have to pay the income tax if you get a job', and we have already discussed that.
That makes A the correct answer to this question.