Robin had been working on bringing two of every meal out the kitchen door ever since Barney had arrived . She was definitely starting to feel taxed because moral support was one thing . Bringing alcohol , conversation , entertainment and food ? That was something else entirely but it was n't like she was going to abandon him or make Marshall do it all .

Question: Why would Robin take on so many things to do when it 's so taxing ?
Answer: Because Robin knew it was her duty , but not the responsibility .Because Robin felt no duty to do it herself except for the show .Because Robin felt the responsibility but not duty to do it herself .Because Robin felt the responsibility and duty to do it herself .