Identify the correct substitution for the underlined portion of the sentence below.
To prepare these muffins start by putting two ripe bananas a cup of walnuts, 2 cups of flour, two eggs, 1 cup of sugar in a bowl.
A. muffins, start by putting two ripe bananas a cup of walnuts
B. muffins, start by putting two ripe bananas a cup of walnuts;
C. muffins; start by putting two ripe bananas a cup of walnuts,
D. muffins, start by putting two ripe bananas, a cup of walnuts,