This question assesses the ideal motivation for choosing a teaching career.
The most noble and professionally sound reason among the choices is the desire to contribute to society by educating and shaping the future generation.
This act of developing human potential is often described as nation-building.
Option (A) is a misconception; teaching is a demanding job.
Option (B) is generally not true; other professions are often more remunerative.
Option (D) suggests using the profession as a stepping stone, which is not an ideal motivation.
Therefore, the desire to build the nation represents the highest ideal for a teacher.