Which revision best corrects the errors in the given sentence? i'll do something quiet such as reading, gardening, or bird-watching instead of riding roller coasters with you.
a. i'll do something quiet: such as reading, gardening, or bird-watching instead of riding roller coasters with you.
b. i'll do something quiet: such as reading, gardening, or bird-watching—instead of riding roller coasters with you.
c. i'll do something quiet—such as, reading, gardening, or bird-watching—instead of riding roller coasters with you.