Final answer:
The correct option is 'b) Only statement II is correct.' Ester must include the travel allowance in her gross income.
Step-by-step explanation:
The correct option for the statement is b) Only statement II is correct.
Statement II is correct because according to the US federal tax code governing income taxes, any travel allowance received by Ester must be included in her gross income. Therefore, Ester must report the travel allowance as part of her income for tax purposes.
Statement I is incorrect because Ester will have gross income to the extent her travel allowance, as well as her actual costs, are included. The actual costs incurred by Ester are deductible from her AGI (Adjusted Gross Income), subject to applicable limits on such deductions.