Which indefinite article would work best in the following sentence?

on the beach, he built huge sandcastle.

a.
a

b.
an

c.
the

our founding fathers introduced the revolutionary idea that each person's desire to pursue their idea of happiness was not self-indulgence, but a necessary driver of a prosperous society. they created a government to defend that right for everyone.

choice 2 i like that prompt better.

penis

explanation:

weddwad

in our power to make a world happy - to teach mankind the art of being so - to a character hitherto unknown - and to have, as it were, a new creation intrusted to our hands, are honors that command reflection, and can neither be too highly estimated,