Final answer:
Spouses being legally separated on June 1, 2017 does not constitute married status for tax filing purposes in the 2017 tax year.
Step-by-step explanation:
In terms of tax filing status for the 2017 tax year, the situation that does not constitute married status is option c: Spouses were legally separated on June 1, 2017.
For tax purposes, married status usually refers to being legally married and not separated. In this case, since the spouses were legally separated on June 1, 2017, they would not be considered married for tax filing purposes at the end of the tax year.
Therefore, option c is the correct answer.