The changes made in the product characteristics such as quality, style and features are calledThe 'non-probability sample' includesThe strategy of introducing new product in existing market is classified as

• A. modifying marketing mixstratified random sampleMarket development
• B. modifying raw material schedulecluster sampleMarket penetration
• C. modifying the productsimple random sampleProduct development
• D. modifying the marketconvenience sampleDiversification