 What is implied when the narrator describes Nelson’s light colored hair?
It was Nelson, his shaggy blond brows drawn scowlingly down over his pale eyes; his thin face a mass of tense lines; his big hands fumbling at the neck of his slicker. Nelson had no answering smile, although there had been a great deal of good-natured joking aboard the Comerford ever since the navy department had sent the scientist on board the cruiser to carry on his experiments. This storm—" Curtis threw his arm around Nelson's dripping shoulders. "But this storm, sir!" Nelson avoided Curtis' friendly eyes and slipped out from under his arm. Nelson's estimate, I'm checking back," he declared, frowning at the two papers and hastily rechecking his own figures.
 Nelson is German by ancestry, raised sympathetic to Germany’s cause.
 Nelson is German by ancestry, raised sympathetic to Germany’s cause.  Nelson is German by ancestry, but was raised on the side of the American effort.  Curtis is prejudiced against people with light hair.  Nelson is Czech