I. Police Commissioner Edwin Curtis refuses to deal with the labor union of the Boston Police. II. The Boston police go on strike.
III. Calvin Coolidge sent in the National Guard.
IV. Edwin Curtis fires the AFL representatives on the police force.

Which of the following shows the chronological order of the events in the list?
a. I, II, III, IV
b. I, II, IV, III
c. I, IV, II, III
d. I, IV, III, II

a. I, II, III, IV

Explanation:

The Boston strike of 1919 saw the Boston Police go on strike after their Police Commissioner Edwin Curtis, refused to deal with any form of union activity in the Boston police force.

As a result of the strike, there was violence in the city and Calvin Coolidge who was governor at the time, called in the National Guard. When order was restored, Edwin Curtis fired the AFL representatives and other striking officers and replaced them with new and better paid ones.

offline recommendation systems option b

because recommendation systems produce a list of two ways

1. through collaborative filtering

or

2. through content-based filtering