Question

Which of following is the best way to correct this run on sentence

First he put the eggs into the cookie batter then he added
the milk
O
A. First he put the eggs into the cookie batter, then he added the
O
B, First he put the eggs into the cookie batter then he added the
milk
O
C. First he put the eggs into the cookie batter, but he added the milk,
O
D. First he put the eggs into the cookie batter. Then he added the
milk,

Answer 1

A) First he put the eggs into the cookie batter, then he added the milk.