From the choices D would appear to be the best.
Make sure it is descriptive and detailed
The topic topic that is suitably limited for a research is "<span>Why Lou Gehrig was forced to resign from playing baseball."
The rest of the research topics like (1) t</span>he 5 of baseball and its greatest players. (2) The home run record and batting average of Lou Gehrig. (3) <span>How Lou Gehrig overcame difficulties to become one of baseball's greatest players?</span>
I’m pretty sure the answer is B. “He looked at the trophy, proud of his victory”.