People usually install (10) to fix known security holes.

A:patches B:compensations C:complements D:additions

One solution to major security problems is (71) , which are frequently installed to fix known security holes。

A:additions B:compensations C:patches D:complements

One solution to major security problems is （），which are frequently installed to fix known security holes.

A:patches B:compensations C:complements D:additions

One solution to major security problem is（），which are frequently installed to fix known security holes.

A:patches B:compensations C:complements D:additions

One solution to major security problems is (72) ,which are frequently installed to fix known security holes.

A:additions B:compensations C:patches D:complements

One solution to major security problems is (71) , which are frequently installed to fix known security holes。

A:additions B:compensations C:patches D:complements

One solution to major security problem is（），which are frequently installed to fix known security holes.

A:patches B:compensations C:complements D:additions