Dna replication occurs
a. so that a cell can grow.
b. so that the cell can divide.
c. so that proteins can be made.
d. so that mutations can be removed.

a. so that a cell can grow.

Mitosis is responsible for this replication. During its phases the cell prepares various needed materials and procedures to do the process and then finally duplicate the DNA into the daughter cells.

Semiconservative mechanism of DNA replication means that each daughter DNA strand contains one strand from the parent and one that is newly synthesized.