Select options that can correctly answer/replace the underlined portions. Bloodletting was a common practice in ancient times. The doctors used to treat patients \[\underline{\mathbf{Q26}}\] the help of leeches. It was generally believed that certain diseases \[\underline{\mathbf{Q27}}\] by too much of blood or by impure blood getting blocked in some parts of the body. The doctors \[\underline{\mathbf{Q28}}\] make a slit on the body or attach leeches there. The leeches sucked the blood \[\underline{\mathbf{Q29}}\] prevented it from clotting.

• A.  from   
• B.         with        
• C.  in          
• D.         as