App Review, No placeholder images, Ipad screenshots

Hey! Just had 2 quick questions on App review as apple support was not able to provide me an answer

  1. my app was rejected due to the app using placeholder images when Foursquare API does not provide images for a specific restaurant, has anyone faced this issue? What did you do to solve it? Should I just remove the placeholder image?

  2. Is there an option to turn on that says your app is not optimized for ipad or is that compulsory

Thank you!

App Review, No placeholder images, Ipad screenshots
 
 
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