WHAT_DOES_‚ÄÖ√Ñ√∂‚ÀÖ√Ë‚ÀÖ‚À´SLEEVE-AND-PROPELLER_ARRANGEMENT‚ÄÖ√Ñ√∂‚ÀÖ√Ë‚ÀÖŒÄ_IN_A_REACTOR_PROVIDES??$#

• A. Good mixing
• B. Efficient heat transfer
• C. Both of the mentioned
• D. None of the mentioned