Which activity is an example o muscular strength?

a: riding a bike for 20 miles
b: lifting bags of groceries
c: swimming for 40 minutes
d: running for 30 minutes

Emma recently found out she was pregnant.every thursday evening for the next six weeks, emma and her mother will attend a special program that prepares pregnant teens to become mothers.during the first class, emma learned about the stages of childbirth.what was the order she was taught? first, emma learned about  .then, she learned about the    stage.next, emma learned about  .last, she learned about the    stage