Legally separated or Married? No paper work

Please help on my friend's case:

She is legally separated from her husband for more than 2 years. She's on a work permit in Canada, he's in Korea.
She's about to apply for her PR, and she does not know if she has to select "legally separated" or "married" in the new IMM0008 Generic.

He has no intention to join her, and she has no intention to include him in the application. They will be going through divorce, but she tells me he's not too co-operative about the whole PR process she'll go through.

Question:
1. If he's not co-operative about the process (signing letters, declaration, etc.), will this be a major obstacle in her PR application?
2. Should she tick "legally separated" or "married" in the form? There's really no paperwork to prove her "legal separation".

Please help. Thank you in advance.