Which sentence best expresses the main point of paragraph?a. A main advantage of online learning is flexibility. b. Students taking online classes are free to learn whenever they want.

c. Traditional learning forces students to gather in classrooms, but online learning does not.

d. With online learning, a student can be doing research in a foreign land and still take classes.

the service industry in the united states grew in the late 1800s. what was one effect of that growth?

the number of people with jobs in factories as unskilled workers decreased.

the number of people with jobs in factories as unskilled workers increased.

the middle class grew as people took jobs as clerks, lawyers, and teachers.

the middle class shrank as people left jobs as clerks, lawyers, and teachers.

choose from these types:

the innocent

the orphan

the hero

the caregiver

the explorer

the rebel