What is the basis of ‚Äö√Ñ√∂‚à ö√ë‚à ö‚à ´binary vector‚Äö√Ñ√∂‚à ö√ë‚à öœÄ strategy?$

• A. No physical attachment
• B. Big size
• C. Strain dependence
• D. Lysogenic/lytic cycle