What is an advantage of using a bacteriophage, compared with a plasmid?
选项：

A:Phages can be used to kill bacteria, and sterilize an area. ;
B:Plasmids do not contain restriction sites. ;
C:Bacteriophages can carry much longer DNA fragments than plasmids. ;
D:Bacteriophages can carry smaller fragments than plasmids. ;
E:Plasmids will not reproduce within bacteria.