Life is short laugh and be merry
The main idea is to emphasise how being organized, efficient and puntual helps a leader to achieve their goals. In this example, Molly Spencer the Spanish Club president, has been able raise funds and help students to go Abroad and be able to practice the spanish in a native speaking country. She is the perfect example of a leader that also inspires others and thanks to discipline, planning and organization is able to achieve efficiency.
A. because preposition has a pronoun or noun with a word relating another noun or pronoun