Question

Select all of the methods that employers used against workers and unions.
a. Employers executed any workers who threatened to strike.
b. Employers locked workers in or out of the workplace.
c. Employers used their wealth to pay workers well and make them happy and productive.
d. Employers used their wealth to hire armed guards.
e. Employers used their wealth to buy unfavorable and often unfair publicity.

Answer 1

"e. Employers used their wealth to buy unfavorable and often unfair publicity" would be the only reasonable option from the list, since the employers wouldn't do things to decrease worker productivity if they could help it. 

Answer 2

So yes he is right e. but B. is also true because in the Triangle shirtwaist Factory fire all the doors was locked because the employers didn't trust the workers.And 146 women died that day in 1911.  And D is correct because the employers really didn't trust the workers and hired armed guards. So your answers are B. D. and E.