Question

what is the best way to punctuate the pause in the sentence below?
after i pick a book usually a mystery or adventure story i really enjoy curling up on the easy chair.
after i pick a book—usually a mystery or adventure story—i really enjoy curling up on the easy chair.
after i pick a book—usually a mystery or adventure story i really enjoy curling up on the easy chair.
after i pick a book . . . usually a mystery or adventure story . . . i really enjoy curling up on the easy chair.
after i pick a book usually a mystery or adventure story i really enjoy, curling up on the easy chair.

Explanation:

The phrase "usually a mystery or adventure story" is a parenthetical aside that adds extra information about the book. Parenthetical asides that are non-essential to the core sentence should be set off on both ends with em dashes to clearly signal the pause and separate the extra information. Ellipses are used for trailing off or omitted text, not parenthetical pauses, and the misplaced comma in the last option disrupts the sentence flow incorrectly.

Answer:

A. After I pick a book—usually a mystery or adventure story—I really enjoy curling up on the easy chair.