Wht does the mn sy is drwbck to the process of restoring books It’s very expensiv
Wht does the mn sy is drwbck to the process of restoring books It’s very expensive. B．It hsn’t proven to be totlly

Wht does the mn sy is drwbck to the process of restoring books It’s very expensiv

Wht does the mn sy is drwbck to the process of restoring books It’s very expensive. B．It hsn’t proven to be totlly

A．It’s very expensive

B．It hasn’t proven to be totally effective

C．It can be damaging to some books．

D．It can’t be used on books published before 1850．