Indirect composite inlay has the following advantages over the direct composite EXCEPT.. Good retention

Indirect composite inlay has the following advantages over the direct composite EXCEPT:
a. Efficient polymerization.
b. Good contact proximally.
c. Gingival seal.
d. Good retention.***
OR:
Indirect composite inlay over come the direct composite by:
1/ insusffition polymerization
2/good contact proximaly
3/ gingival seal
4/ good retention
1/ 1-2-4
2/ 1-2-3.***
3/ 4-3.