Which of the following is true about tm?

• A. It can be termed as renaturation temperature
• B. The higher the content of G ‚Äö√Ñ√∂‚àö¬¢¬¨‚àû C base pairs, the higher the tm
• C. The higher the content of A = T base pairs, the higher the tm
• D. The higher the content of G ‚Äö√Ñ√∂‚àö¬¢¬¨‚àû C base pairs, the lower the tm