Roses always provide a stunning display of color, but only those flowers that smell sweet are worth growing in a garden. Some roses have no scent. Which one the following conclusions can be properly drawn from the passage? ['Some roses which smell sweet are not worth growing in a garden.', 'No sweet-smelling flower is worth growing in a garden unless it provides a stunning display of color.', 'All flowers with no scent provide a stunning display of color.', 'Some flowers which provide a stunning display of color are not worth growing in a garden.']