Which of the following types of base materials can be placed in contact with polymethyl methaacrylate & not inhibit the polymerization of the resin.. Zn phosphate cement

Which of the following types of base materials can be placed in contact with polymethyl methaacrylate & not inhibit the polymerization of the resin:
a. ZOE
b. GI cement
c. Zn phosphate cement
d. Varnish
e. B, c.***