Based on his age and income, the maximum that Jack is able to contribute to a Roth IRA in 2019 is C. 7,000.
In the year 2019, tax laws were such that:
As Jack is above the age of 50, he can contribute an extra $1,000 over the limit which puts him at:
= 6,000 + 1,000
= $7,000
In conclusion, Jack can contribute a maximum of $7,000.
Find out more on Roth IRA at https://brainly.com/question/1300867.