All choices agree that it is "six and (something)".
So, you're asked to figure out whether 0.2 + 0.07 = 0.27 is
You can start with the original expanded form to decide
... (2 × 0.1) + (7 × 0.01) = (20 × 0.01) + (7 × 0.01)
... = (20+7) × 0.01 = (27 × 0.01)
Since you know 0.01 is 1 hundredth, you know the correct choice is ...
... six and twenty-seven hundredths