It should be C. Geometry. After all, Euclid of Alexandria is considered the father of geometry! :D
Answer:
Explanation:This might help
Definition: Labor unions or trade unions are organizations formed by workers from related fields that work for the common interest of its members. They help workers in issues like fairness of pay, good working environment, hours of work and benefits.
The size and enthusiasm of the American forces bolstered the French and British.