Rate the following argument fragment on its writing, argument, and language skills:
Evidence: The author support's the idea by saying ," Each previous mission was unmanned , and for good reason , since no spacecraft survived the landing for more than a few hours . Maybe this issue explains why not a single spaceship has touched down on venus in more than three decades . Numerous factors contribute to venus"s reputation as a challenging planet for humans to study , despite its proximity to us ".

Score: 1