A. The sentence works fine. one could argue B, but a colon is used to separate a run-on or show two complete thoughts in the same sentence, so arguably B would not work either.
D) To spare him expense his mother sent him...veal baked in the oven.
Answer:
it helps move the plot forward
Explanation:
He is referring to the bird as clumsy because "ungainly" is define as "awkward" or "clumsy" and "fowl" is another word for "bird"