Choose which of the following uses these marks of punctuation correctly.
a.
in america, edgar allan poe was long regarded as a minor writer (an author) of melodramatic poems and thrilling tales of mystery and suspense.
c.
[in america,] edgar allan poe was long regarded as a minor writer—an author of melodramatic poems and thrilling tales of mystery and suspense.
b.
in america, edgar allan poe was long regarded as a minor writer—an author of melodramatic poems and thrilling tales of mystery and suspense.
d.
in america, edgar allan poe was long regarded as a minor writer an author of melodramatic poems and thrilling tales of mystery and suspense.

select the best answer from the choices provided