Which revision best corrects the errors in given sentence?

the youngest campers ages 5
3-5 will listen to a story between lunchtime and naptime.

a. the youngest campers (ages 3-5) will listen to a story between lunchtime and naptime.

b. the youngest campers ages 3-5 will listen to a story between lunchtime (and naptime.)

c. the youngest campers ages 3-5 will listen to a story between lunchtime (and naptime)

i think a.

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.

it b =a chorus ik for a fact