I know that answer choice c and d are incorrect.
"C) while, the President is on board, the term is commonly used >> no comma is need here.
D) while the President, is on board, the term is commonly used" >> still, no comma is needed.
__________________________________________________________
B) while the President is on board the term is commonly used
So A is the answer.
Should read >> While the President is on board, the term is commonly used.
Hope this helps.
Read more on Brainly.com - https://brainly.com/question/2377115#readmore