We’re watching a comedy. We’re laughing happily. A. We’re watching a comedy, but we’re laughing happily. B. We’re watching a comedy, or we’re laughing happily. C. We’re watching a comedy, so

We’re watching a comedy, but we’re laughing happily.

We’re watching a comedy, or we’re laughing happily.

We’re watching a comedy, so we’re laughing happily.

We’re watching a comedy although we’re laughing happily.