Who were the original knights of labor?

a. a group of factory owners in the steel industry
b. a group of skilled workers who made clothes
c. an army unit that stopped a large railroad strike
d. a political party that started in los angeles

B. A group of skilled workers who made clothes

Explanation:

The Knights of Labor, or KOL, was the first large and national union of workers founded in America, that aimed to protect the workers from abuses by their bosses and the factory owners, founded in 1869 by 1886 they´d became the lardest union force in the United States with over 700,000 members.

angle a = 40.6°

step-by-step explanation:

for any right angle triangle we know the pythagoras theorem reveals

hypotenuse² = height²+base²

by this formula we will calculate the length of hypotenuse

h² = 6²+7²

⇒ h =√36+49 = √85 = 9.22

now from the given triangle sin a = height/ hypotenuse

                                                sin a = 6/9.22 = 0.651

therefore

so angle a = 40.6°