US firms are at the forefront of technological advances.
FROM PLATO
A. and C.
As French was still struggling with the damage caused in WW1
Answer:
a whistle blower. A whistle blower is a person who informs on a person or organization engaged in an illicit activity. which is the definition you have described.
When leaders seek advice, feedback, and help to the broader circle of workers, they demonstrate humility and quiet confidence. These are very attractive qualities in a leader. More important, they build trust and inspire mutual success. This is an area where men could learn from women.
A and C seem like the most efficient answers