Answer:
D
Explanation:
The subject is plural, and I don't know how to explain this correctly, but I think that's the answer because it makes the verb singular.
They are both string instruments.
first there is ones then to the right there is a decimal you are going to be adding the "<em>ths" (</em>EX. hundredths, tenths, thousandths) so you are going to have 8 hundredths (.08)