Paco needs at least 3/8 yard of twine to build a model ship. How much twine could he buy?

a. 3/10 yard,

b. 1/4 yard

c. 3/5 yard

d. 1/8 yard.

Minimum length of twine required by Paco to build a model ship = 3/8 yard

= 0.375 yard.

There are several options already given in the question. We have to check them before reaching a final conclusion.

Option a = 3/10 yard

= 0.3 yard

So option is less than that reuired and hence cancelled.

Option b = 1/4 yard

= 0.25

So this option is also less than the length required and hence cancelled.

Option c = 3/5 yard

= 0.60 yard.

This option looks feasible, but the final option needs to be checked before getting to the conclusion.

Option d = 1/8 yard

= 0.125 yard

Now we can finally conclude that among all the options given in the question, option "c" is the correct option.